Larian Studios Forums Divinity: Original Sin 2 - The Modding Dungeon Divinity - Original Sin 2 - Modding General Need help making a skill

The damage part I believe is not possible without scripting unfortunately. You can apply another status that does damage though, like poison, but that's not what you want.

But for the other part, you just need this in the Skill Properties: TARGET:IF(HasStatus:STATUS_TYPE_HERE):something you want to happen here(which would have been deal more damage)

For example..

TARGET:IF(HasStatus:SLEEPING):TargetCreateSurface,1,,Water,100,3

If the target is sleeping, place a water surface of 1m radius underneath them that lasts 3 turns(100% chance).