added isSkill condition authored by Lxlp's avatar Lxlp
## Description
Checks the cause of the damage the entity took, if the skilltree originated from a [onDamaged Trigger](/Skills/Triggers/onDamaged) or an [onDamaged Aura](/skills/mechanics/ondamaged).
A list of valid damage causes can be found in the [Spigot DamageCause javadoc](https://hub.spigotmc.org/javadocs/spigot/org/bukkit/event/entity/EntityDamageEvent.DamageCause.html).
## Attributes
| Attribute | Aliases | Description | Default |
|-----------|-----------|----------------------------------------------------------------|---------------|
| damagecause | cause, c | The damage cause to match | ENTITY_ATTACK<!--type:DamageCause--> |
## Examples
```yaml
Conditions:
- damagecause{cause=ENTITY_ATTACK} true
```
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