Way of the abyss

Evil monks who serve  demon lords or other powerful demons.

Their attacks are based on fire and necrotic damage.  

THIS SUBCLASS IS ONLY FOR EVIL MONKS

Level 3: Lesser abyssal blood

When you finish a long rest you can choose a damage type from Fire, Poison, or Necrotic. You gain resistance to that damage type, until you choose a different one with this feature. Damage from silvered  or magic weapons, or spells ignore this feature.

Level 6: Abyssal pummeling

You can spend 2 ki points to cast burning hands at first level as a bonus action. You can spend 2 additional ki points to increase the level, up to 5th level(10 ki points).

Level 11: Wave of destruction

You can spend 7 ki points to cast destructive wave, using necrotic damage(you can't use radiant damage)

Level 17: True abyssal blood

You can spend 10 ki points to grant the following benefits for 10 minutes.

. You are immune to fire and poison damage.

. You are immune to the poisoned condition

. Spectral wings appear on your back, granting you a flying seed of 60 feet.

. You have a +2 bonus to your AC

. All of your attacks are magical