Larian Studios Forums Divinity: Original Sin 2 Divinity - Original Sin 2 - General Blood Surfaces?

So I've made a necro/scoundrel ( witch ) with elemental affinity talent. I was wondering how do I make my enemies spill blood on the ground? When I hit them they sometimes drop blood on the floor but sometimes they don't. What's the rule here, do I need to deplete their physical armor first?
Also, which skills other than blood rain make blood surfaces?
Thanks!

From the top of my head, these are the ways to get blood on the ground.

- Flesh Sacrifice (Elf Racial Skill)
- Damage an enemy's vitality (might only be with a weapon, not sure)
- Blood Rain
- Raise Bloaded Corpse has a skill that kills it and deal physical damage in a area around. Quite sure it leaves blood behind as well

Thank you!
I believe damaging vitality with physical attacks are the key too. But do Skills also work like that? For example Mosquito Swarm, Decaying touch, Infect?