Healing Potion is a consumable item in Divinity: Original Sin II. Healing Potion is a type of consumable item. When used it will restore set amount of Vitality. However when used by an Undead character or by any character afflicted with Decaying status effect, they will be dealt Physical Damage…
https://divinity.fandom.com/wiki/Healing_Potion_(Original_Sin_2)