Abilities Data Driven
Most abilities in Dota 2 are defined by C++ code. When looking at these abilities, the npc_abilities.txt keyvalues file contains some ability metadata and exposes some tuning knobs, these are mostly metadata with all the actual behavior defined in code. The data driven ability system is a method to create custom abilities for Dota 2 and assign special properties and events to occur when they're used.
A Simple Example
Here is a very simple example ability. It's a passive that applies a visual effect to the unit with that ability.
"fx_test_ability"
{
// General
//-------------------------------------------------------------------------------------------------------------
"BaseClass" "ability_datadriven"
"AbilityBehavior" "DOTA_ABILITY_BEHAVIOR_PASSIVE"
"AbilityTextureName" "axe_battle_hunger"
// Modifiers
//-------------------------------------------------------------------------------------------------------------
"Modifiers"
{
"fx_test_modifier"
{
"Passive" "1"
"OnCreated"
{
"AttachEffect"
{
"Target" "CASTER"
"EffectName" "generic_buff_1"
"EffectAttachType" "follow_overhead"
"EffectLifeDurationScale" "1"
"EffectColorA" "255 255 0"
}
}
}
}
}
The "BaseClass", "AbilityBehavior" and "AbilityTextureName" keys are common to all abilities:
"BaseClass" - Normally DOTA chooses the C++ class to connect to an ability by looking at the ability name (in this case "fx_test_ability"). If you'd like to force DOTA to use a different C++ class, the "BaseClass" key will do that - in this example we're using the ability_datadriven class to connect to the data driven ability system. It's possible to use this key to connect to any other existing ability code to make a new variant of an old ability, with different settings for whatever that ability exposes to keyvalues.
"ID" - ID is a unique number for stats tracking. This is not used for data driven abilities.
"AbilityBehavior" is a set of flags describing some properties of the ability. You can put flags in here separated by spaces and | for example "DOTA_ABILITY_BEHAVIOR_HIDDEN | DOTA_ABILITY_BEHAVIOR_NO_TARGET" - the spaces are important!
DOTA_ABILITY_BEHAVIOR_HIDDEN = 1 << 0, //This ability can be owned by a unit but can't be casted and wont show up on the HUD. DOTA_ABILITY_BEHAVIOR_PASSIVE = 1 << 1, //Can't be casted like above but this one shows up on the ability HUD DOTA_ABILITY_BEHAVIOR_NO_TARGET = 1 << 2, //Doesn't need a target to be cast, ability fires off as soon as the button is pressed DOTA_ABILITY_BEHAVIOR_UNIT_TARGET = 1 << 3, //Ability needs a target to be casted on. DOTA_ABILITY_BEHAVIOR_POINT = 1 << 4, //Ability can be cast anywhere the mouse cursor is (If a unit is clicked it will just be cast where the unit was standing) DOTA_ABILITY_BEHAVIOR_AOE = 1 << 5, //This ability draws a radius where the ability will have effect. Kinda like POINT but with a an area of effect display. DOTA_ABILITY_BEHAVIOR_NOT_LEARNABLE = 1 << 6, //This ability probably can be casted or have a casting scheme but cannot be learned (these are usually abilities that are temporary like techie's bomb detonate) DOTA_ABILITY_BEHAVIOR_CHANNELLED = 1 << 7, //This ability is channeled. If the user moves or is silenced the ability is interrupted. DOTA_ABILITY_BEHAVIOR_ITEM = 1 << 8, //This ability is tied up to an item. DOTA_ABILITY_BEHAVIOR_TOGGLE = 1 << 9, //This ability can be insta-toggled DOTA_ABILITY_BEHAVIOR_DIRECTIONAL = 1 << 10, //This ability has a direction from the hero, such as miranas arrow or pudge's hook DOTA_ABILITY_BEHAVIOR_IMMEDIATE = 1 << 11, //This ability can be used instantly without going into the action queue DOTA_ABILITY_BEHAVIOR_AUTOCAST = 1 << 12, //This ability can be casted automatically DOTA_ABILITY_BEHAVIOR_NOASSIST = 1 << 13, //This ability has no reticle assist DOTA_ABILITY_BEHAVIOR_AURA = 1 << 14, //This ability is an aura. We don't really use this other than to tag the ability as so DOTA_ABILITY_BEHAVIOR_ATTACK = 1 << 15, //This ability is an attack and cannot hit attack-immune targets DOTA_ABILITY_BEHAVIOR_DONT_RESUME_MOVEMENT = 1 << 16, //This ability should not resume movement when it completes. Only applicable to no-target, non-immediate abilities. DOTA_ABILITY_BEHAVIOR_ROOT_DISABLES = 1 << 17, //This ability cannot be used when rooted DOTA_ABILITY_BEHAVIOR_UNRESTRICTED = 1 << 18, //This ability is allowed when commands are restricted DOTA_ABILITY_BEHAVIOR_IGNORE_PSEUDO_QUEUE = 1 << 19, //This ability can be executed while stunned, casting, or force-attacking. Only applicable to toggled abilities. DOTA_ABILITY_BEHAVIOR_IGNORE_CHANNEL = 1 << 20, //This ability can be executed without interrupting channels DOTA_ABILITY_BEHAVIOR_DONT_CANCEL_MOVEMENT = 1 << 21, //This ability doesn't cause certain modifiers to end, used for courier and speed burst DOTA_ABILITY_BEHAVIOR_DONT_ALERT_TARGET = 1 << 22, //This ability does not alert enemies when target-cast on them DOTA_ABILITY_BEHAVIOR_DONT_RESUME_ATTACK = 1 << 23, //This ability should not resume command-attacking the previous target when it completes. Only applicable to no-target, non-immediate abilities and unit-target abilities. DOTA_ABILITY_BEHAVIOR_NORMAL_WHEN_STOLEN = 1 << 24, //This ability still uses its normal cast point when stolen. DOTA_ABILITY_BEHAVIOR_IGNORE_BACKSWING = 1 << 25, //This ability ignores backswing psuedoqueue DOTA_ABILITY_BEHAVIOR_RUNE_TARGET = 1 << 26, //TArgets Runes
"AbilityTextureName" is the icon that should be used in the UI for this ability. You can use this to borrow the icon from another ability just by putting that ability name here.
"Modifiers" is unique to data-driven abilities. This block describes a set of modifiers (a.k.a. Buffs) that are unique to this ability. Each modifier is named by the name of the keyvalues block that defines the modifier.
"Passive" in a modifier flags the modifier as a passive modifier that should automatically be applied to the ability owner.
"OnCreated" is an action block that is triggered when the modifier is first attached to the owner. In this example, we attach a visual effect to the ability caster.
Ability Events and Actions
Abilities have various in-game events which can trigger behaviour. The events that can trigger actions on an ability are:
"OnChannelFinish" "OnChannelInterrupted" "OnChannelSucceeded" "OnOwnerDied" "OnOwnerSpawned" "OnProjectileFinish" "OnProjectileHitUnit" "OnSpellStart" "OnToggleOff" "OnToggleOn" "OnUpgrade"
Each of these keys is a block that contains one or more action descriptions. The actions you can use are:
"AddAbility" "Target", "AbilityName"
"ActOnTargets" "Target", "Action"
"ApplyModifier" "Target", "ModifierName"
"AttachEffect" "EffectName", "EffectAttachType", "Target", "ControlPoints"
"Blink" "Target" (position to blink to)
"CreateThinker" "Target", "ModifierName"
"Damage" "Target", "Type", "MinDamage"/"MaxDamage" or "Damage"
"DestroyTrees" "Target", "Radius"
"FireEffect" "EffectName", "EffectAttachType", "Target", "ControlPoints"
"FireSound" "EffectName", "Target"
"Knockback" "Target", "Center", "Duration", "Distance", "Height", "IsFixedDistance", "ShouldStun"
"LevelUpAbility" "Target", "AbilityName"
"Lifesteal" "Target", "LifestealPercent"
"LinearProjectile" "Target", "EffectName", "MoveSpeed", "StartRadius", "EndRadius", "FixedDistance", "StartPosition", "TargetTeams", "TargetTypes", "TargetFlags", "HasFrontalCone", "ProvidesVision", "VisionRadius"
"Random" "Chance", "PseudoRandom", "OnSuccess", "OnFailure"
"RemoveAbility" "Target", "AbilityName"
"RemoveModifier" "Target", "ModifierName"
"SpawnUnit" "UnitName", "UnitCount", "UnitLimit", "SpawnRadius", "Duration", "Target", "GrantsGold", "GrantsXP"
"Stun" "Target", "Duration"
"TrackingProjectile" "EffectName", "Dodgeable", "ProvidesVision", "VisionRadius", "MoveSpeed", "SourceAttachment"
Note:AddAbility adds a new ability at level 0. RemoveAbility deletes the ability even if it has been leveled. More complex ability management should be done through script as opposed to the data driven system.Action Targets
Target selection for actions exposes some choices. A "Target" key can have a value of "CASTER", "TARGET", "POINT", "ATTACKER" or "UNIT" for simple single-target selection. These names mean different things in different events - experiment to discover exactly what in each case.
For selecting multiple targets in an area, make the "Target" key a block with the following subkeys:
"Center" - "CASTER", "TARGET", "POINT", "PROJECTILE", "UNIT", "ATTACKER" "Radius" - The radius to search for target(s) in.
"Teams" - Target team(s) DOTA_UNIT_TARGET_TEAM_BOTH DOTA_UNIT_TARGET_TEAM_CUSTOM DOTA_UNIT_TARGET_TEAM_ENEMY DOTA_UNIT_TARGET_TEAM_FRIENDLY DOTA_UNIT_TARGET_TEAM_NONE
"Types" - Target units of specified type "ExcludeTypes" - Reject units of the specified type DOTA_UNIT_TARGET_ALL DOTA_UNIT_TARGET_BASIC DOTA_UNIT_TARGET_BUILDING DOTA_UNIT_TARGET_COURIER DOTA_UNIT_TARGET_CREEP DOTA_UNIT_TARGET_CUSTOM DOTA_UNIT_TARGET_HERO DOTA_UNIT_TARGET_MECHANICAL DOTA_UNIT_TARGET_NONE DOTA_UNIT_TARGET_OTHER DOTA_UNIT_TARGET_TREE
"Flags" - Target units with specified flags "ExcludeFlags" - Reject units with specified flag DOTA_UNIT_TARGET_FLAG_CHECK_DISABLE_HELP DOTA_UNIT_TARGET_FLAG_DEAD DOTA_UNIT_TARGET_FLAG_FOW_VISIBLE DOTA_UNIT_TARGET_FLAG_INVULNERABLE DOTA_UNIT_TARGET_FLAG_MAGIC_IMMUNE_ENEMIES DOTA_UNIT_TARGET_FLAG_MANA_ONLY DOTA_UNIT_TARGET_FLAG_MELEE_ONLY DOTA_UNIT_TARGET_FLAG_NO_INVIS DOTA_UNIT_TARGET_FLAG_NONE DOTA_UNIT_TARGET_FLAG_NOT_ANCIENTS DOTA_UNIT_TARGET_FLAG_NOT_ATTACK_IMMUNE DOTA_UNIT_TARGET_FLAG_NOT_CREEP_HERO DOTA_UNIT_TARGET_FLAG_NOT_DOMINATED DOTA_UNIT_TARGET_FLAG_NOT_ILLUSIONS DOTA_UNIT_TARGET_FLAG_NOT_MAGIC_IMMUNE_ALLIES DOTA_UNIT_TARGET_FLAG_NOT_NIGHTMARED DOTA_UNIT_TARGET_FLAG_NOT_SUMMONED DOTA_UNIT_TARGET_FLAG_OUT_OF_WORLD DOTA_UNIT_TARGET_FLAG_PLAYER_CONTROLLED DOTA_UNIT_TARGET_FLAG_RANGED_ONLY
"MaxTargets" - Maximum number of targets to select "Random" - Whether to select a random unit if more than MaxTargets exist [Boolean]
"ScriptSelectPoints"
"ScriptFile", "Function", "Radius", "Count"
Note:Random set to 0 in conjunction with a MaxTargets value will cause the ability to only function if there is MaxTargets or less targets in the area.Modifier Properties
Modifier properties are gameplay values a modifier can change on the unit it is applied to. Included here is a simple example of a modifier that slows attacks and movement speed (this chunk is a block inside the "Modifiers" block of an ability).
To specify numeric values, you can put in a number or you can use %name formatting to grab values out of the "AbilitySpecial" block of the ability. The advantage to using the %name syntax is that the value can change as the ability levels up and the numeric value can be formatted into tooltips.
In this example, the slow duration comes from an "AbilitySpecial" block, but the slow values are just numbers.
"creature_slithereen_crush_slow"
{
"Duration" "%slow_duration"
"Properties"
{
"MODIFIER_PROPERTY_MOVESPEED_BONUS_PERCENTAGE" "-20"
"MODIFIER_PROPERTY_ATTACKSPEED_BONUS_PERCENTAGE" "-20"
}
}
Available Modifier Properties
MODIFIER_PROPERTY_ABSOLUTE_NO_DAMAGE_MAGICALMODIFIER_PROPERTY_ABSOLUTE_NO_DAMAGE_PHYSICALMODIFIER_PROPERTY_ABSOLUTE_NO_DAMAGE_PUREMODIFIER_PROPERTY_ABSORB_SPELLMODIFIER_PROPERTY_ATTACK_RANGE_BONUSMODIFIER_PROPERTY_ATTACKSPEED_BONUS_CONSTANTMODIFIER_PROPERTY_ATTACKSPEED_BONUS_CONSTANT_POWER_TREADSMODIFIER_PROPERTY_ATTACKSPEED_BONUS_CONSTANT_SECONDARYMODIFIER_PROPERTY_AVOID_CONSTANTMODIFIER_PROPERTY_AVOID_SPELLMODIFIER_PROPERTY_BASEATTACK_BONUSDAMAGEMODIFIER_PROPERTY_BASE_ATTACK_TIME_CONSTANTMODIFIER_PROPERTY_BASEDAMAGEOUTGOING_PERCENTAGEMODIFIER_PROPERTY_BASE_MANA_REGENMODIFIER_PROPERTY_BONUS_DAY_VISIONMODIFIER_PROPERTY_BONUS_NIGHT_VISIONMODIFIER_PROPERTY_BONUS_VISION_PERCENTAGEMODIFIER_PROPERTY_CHANGE_ABILITY_VALUEMODIFIER_PROPERTY_COOLDOWN_REDUCTION_CONSTANTMODIFIER_PROPERTY_DAMAGEOUTGOING_PERCENTAGEMODIFIER_PROPERTY_DAMAGEOUTGOING_PERCENTAGE_ILLUSIONMODIFIER_PROPERTY_DEATHGOLDCOSTMODIFIER_PROPERTY_DISABLE_AUTOATTACKMODIFIER_PROPERTY_DISABLE_HEALINGMODIFIER_PROPERTY_DISABLE_TURNINGMODIFIER_PROPERTY_EVASION_CONSTANTMODIFIER_PROPERTY_EXTRA_HEALTH_BONUSMODIFIER_PROPERTY_EXTRA_MANA_BONUSMODIFIER_PROPERTY_EXTRA_STRENGTH_BONUSMODIFIER_PROPERTY_FORCE_DRAW_MINIMAPMODIFIER_PROPERTY_HEALTH_BONUSMODIFIER_PROPERTY_HEALTH_REGEN_CONSTANTMODIFIER_PROPERTY_HEALTH_REGEN_PERCENTAGEMODIFIER_PROPERTY_IGNORE_CAST_ANGLEMODIFIER_PROPERTY_INCOMING_DAMAGE_PERCENTAGEMODIFIER_PROPERTY_INCOMING_PHYSICAL_DAMAGE_PERCENTAGEMODIFIER_PROPERTY_INCOMING_SPELL_DAMAGE_CONSTANTMODIFIER_PROPERTY_INVISIBILITY_LEVELMODIFIER_PROPERTY_IS_ILLUSIONMODIFIER_PROPERTY_IS_SCEPTERMODIFIER_PROPERTY_LIFETIME_FRACTIONMODIFIER_PROPERTY_MAGICAL_RESISTANCE_BONUSMODIFIER_PROPERTY_MAGICAL_RESISTANCE_DECREPIFY_UNIQUEMODIFIER_PROPERTY_MAGICAL_RESISTANCE_ITEM_UNIQUEMODIFIER_PROPERTY_MANA_BONUSMODIFIER_PROPERTY_MANA_REGEN_CONSTANTMODIFIER_PROPERTY_MANA_REGEN_CONSTANT_UNIQUEMODIFIER_PROPERTY_MANA_REGEN_PERCENTAGEMODIFIER_PROPERTY_MANA_REGEN_TOTAL_PERCENTAGEMODIFIER_PROPERTY_MIN_HEALTHMODIFIER_PROPERTY_MISS_PERCENTAGEMODIFIER_PROPERTY_MODEL_CHANGEMODIFIER_PROPERTY_MODEL_SCALEMODIFIER_PROPERTY_MOVESPEED_ABSOLUTEMODIFIER_PROPERTY_MOVESPEED_BASE_OVERRIDEMODIFIER_PROPERTY_MOVESPEED_BONUS_CONSTANTMODIFIER_PROPERTY_MOVESPEED_BONUS_PERCENTAGEMODIFIER_PROPERTY_MOVESPEED_BONUS_PERCENTAGE_UNIQUEMODIFIER_PROPERTY_MOVESPEED_BONUS_UNIQUEMODIFIER_PROPERTY_MOVESPEED_LIMITMODIFIER_PROPERTY_MOVESPEED_MAXMODIFIER_PROPERTY_OVERRIDE_ANIMATIONMODIFIER_PROPERTY_OVERRIDE_ANIMATION_RATEMODIFIER_PROPERTY_OVERRIDE_ANIMATION_WEIGHTMODIFIER_PROPERTY_OVERRIDE_ATTACK_MAGICALMODIFIER_PROPERTY_PERSISTENT_INVISIBILITYMODIFIER_PROPERTY_PHYSICAL_ARMOR_BONUSMODIFIER_PROPERTY_PHYSICAL_ARMOR_BONUS_ILLUSIONSMODIFIER_PROPERTY_PHYSICAL_ARMOR_BONUS_UNIQUEMODIFIER_PROPERTY_PHYSICAL_ARMOR_BONUS_UNIQUE_ACTIVEMODIFIER_PROPERTY_PHYSICAL_CONSTANT_BLOCKMODIFIER_PROPERTY_POST_ATTACKMODIFIER_PROPERTY_PREATTACK_BONUS_DAMAGEMODIFIER_PROPERTY_PREATTACK_BONUS_DAMAGE_POST_CRITMODIFIER_PROPERTY_PREATTACK_CRITICALSTRIKEMODIFIER_PROPERTY_PROCATTACK_BONUS_DAMAGE_COMPOSITEMODIFIER_PROPERTY_PROCATTACK_BONUS_DAMAGE_MAGICALMODIFIER_PROPERTY_PROCATTACK_BONUS_DAMAGE_PHYSICALMODIFIER_PROPERTY_PROCATTACK_BONUS_DAMAGE_PUREMODIFIER_PROPERTY_PROCATTACK_FEEDBACKMODIFIER_PROPERTY_PROVIDES_FOW_POSITIONMODIFIER_PROPERTY_REINCARNATIONMODIFIER_PROPERTY_RESPAWNTIMEMODIFIER_PROPERTY_RESPAWNTIME_PERCENTAGEMODIFIER_PROPERTY_RESPAWNTIME_STACKINGMODIFIER_PROPERTY_STATS_AGILITY_BONUSMODIFIER_PROPERTY_STATS_INTELLECT_BONUSMODIFIER_PROPERTY_STATS_STRENGTH_BONUSMODIFIER_PROPERTY_TOOLTIPMODIFIER_PROPERTY_TOTAL_CONSTANT_BLOCKMODIFIER_PROPERTY_TOTAL_CONSTANT_BLOCK_UNAVOIDABLE_PRE_ARMORMODIFIER_PROPERTY_TOTALDAMAGEOUTGOING_PERCENTAGEMODIFIER_PROPERTY_TRANSLATE_ACTIVITY_MODIFIERSMODIFIER_PROPERTY_TRANSLATE_ATTACK_SOUNDMODIFIER_PROPERTY_TURN_RATE_PERCENTAGE
Modifier States
States are very similar to properties, except they are tri-state values. A state can have the value "MODIFIER_STATE_VALUE_NO_ACTION", "MODIFIER_STATE_VALUE_ENABLED" or "MODIFIER_STATE_VALUE_DISABLED". This example modifier attaches a simple stunned effect, overrides the base unit's animation and forces the unit into the stunned state:
"creature_bash_ministun"
{
"Duration" "%duration"
"EffectName" "generic_stunned"
"EffectAttachType" "follow_overhead"
"Duration" "%stun_duration"
"OverrideAnimation" "ACT_DOTA_DISABLED"
"States"
{
"MODIFIER_STATE_STUNNED" "MODIFIER_STATE_VALUE_ENABLED"
}
}
Here is a list of all the states available to a modifier:
MODIFIER_STATE_ATTACK_IMMUNE MODIFIER_STATE_BLIND MODIFIER_STATE_BLOCK_DISABLED MODIFIER_STATE_CANNOT_MISS MODIFIER_STATE_COMMAND_RESTRICTED MODIFIER_STATE_DISARMED MODIFIER_STATE_DOMINATED MODIFIER_STATE_EVADE_DISABLED MODIFIER_STATE_FLYING MODIFIER_STATE_FROZEN MODIFIER_STATE_HEXED MODIFIER_STATE_INVISIBLE MODIFIER_STATE_INVULNERABLE MODIFIER_STATE_LOW_ATTACK_PRIORITY MODIFIER_STATE_MAGIC_IMMUNE MODIFIER_STATE_MUTED MODIFIER_STATE_NIGHTMARED MODIFIER_STATE_NO_HEALTH_BAR MODIFIER_STATE_NO_TEAM_MOVE_TO MODIFIER_STATE_NO_TEAM_SELECT MODIFIER_STATE_NOT_ON_MINIMAP MODIFIER_STATE_NOT_ON_MINIMAP_FOR_ENEMIES MODIFIER_STATE_NO_UNIT_COLLISION MODIFIER_STATE_OUT_OF_GAME MODIFIER_STATE_PASSIVES_DISABLED MODIFIER_STATE_PROVIDES_VISION MODIFIER_STATE_ROOTED MODIFIER_STATE_SILENCED MODIFIER_STATE_SOFT_DISARMED MODIFIER_STATE_SPECIALLY_DENIABLE MODIFIER_STATE_STUNNED MODIFIER_STATE_UNSELECTABLE
Modifier Events
Here is a list of all the events available to a modifier:
MODIFIER_EVENT_ON_ABILITY_END_CHANNEL MODIFIER_EVENT_ON_ABILITY_EXECUTED MODIFIER_EVENT_ON_ABILITY_START MODIFIER_EVENT_ON_ATTACK MODIFIER_EVENT_ON_ATTACK_ALLIED MODIFIER_EVENT_ON_ATTACKED MODIFIER_EVENT_ON_ATTACK_FAIL MODIFIER_EVENT_ON_ATTACK_LANDED MODIFIER_EVENT_ON_ATTACK_START MODIFIER_EVENT_ON_BREAK_INVISIBILITY MODIFIER_EVENT_ON_DEATH MODIFIER_EVENT_ON_HEAL_RECEIVED MODIFIER_EVENT_ON_HEALTH_GAINED MODIFIER_EVENT_ON_HERO_KILLED MODIFIER_EVENT_ON_MANA_GAINED MODIFIER_EVENT_ON_ORB_EFFECT MODIFIER_EVENT_ON_ORDER MODIFIER_EVENT_ON_PROCESS_UPGRADE MODIFIER_EVENT_ON_PROJECTILE_DODGE MODIFIER_EVENT_ON_REFRESH MODIFIER_EVENT_ON_RESPAWN MODIFIER_EVENT_ON_SPENT_MANA MODIFIER_EVENT_ON_STATE_CHANGED MODIFIER_EVENT_ON_TAKEDAMAGE MODIFIER_EVENT_ON_TAKEDAMAGE_REAPERSCYTHE MODIFIER_EVENT_ON_TELEPORTED MODIFIER_EVENT_ON_TELEPORTING MODIFIER_EVENT_ON_UNIT_MOVED
Modifiers can also describe actions that should happen on various in-game events. Each of these keys is a block that describes actions - the action description system is documented elsewhere on this page. The events that are supported are:
OnAbilityExecuted OnAttacked - The unit this modifier is attached to has been attacked. OnAttackLanded - The unit this modifier is attached to has landed an attack on a target. OnAttackStart - The unit this modifier is attached to has started to attack a target. OnCreated - The modifier has been created. OnDealDamage - The unit this modifier is attached to has dealt damage. OnDeath OnDestroy - The modifier has been removed. OnKill OnOrbFire OnOrbImpact OnTakeDamage - The unit this modifier is attached to has taken damage. Orb