Nihilistic Rise

The chaos has shown its fangs and bares it to corrupt those who wish to wield it.

You are blessed by the prince of chaos as you gain the ability to lend yourself to corruption. In turn, you gain some benefits. When you take damage from any sources you gain a stack of corruption equal to half the damage dealt (rounded down) (doesn't get reduced by you being at 0 hit points). The more stacks you have, the more your appearance grows moth-like as chaos corrupts you and brings you back to your primal form. Every time you hit a milage from your stacks you are brought to further corruption this stacks can only be gain during combat.
(this stacks of corruption always start at 0 at the beginning of combat and resets back to 0 when combat ends.)

• 100 Corruption - Once your corruption stack have reached 100 you may change all of your attacks into acid damage as the chaos turns your pheromones into a lethal corrosive gas that coats even your weapon as you channel your zealotry with it.
• 200 Corruption - Once your corruption stack have reached 200 when you rage or rerage, you may spend an additional use as a part of that bonus action all damage you receive halved for the duration of that rage as you attune more to chaos's embrace.
• 250 Corruption - Once your corruption stack have reached 250, the acid damage you deal to a hostile creature bypasses resistance and treats immunity as resistance.
• 300 Corruption - Once your corruption stack have reached 300 as long as your rage is up the corrosive acid damage you deal to a hostile creature splashes to a different target of your choice that's within 5 feet of the hostile creature you hit.

As an action you may expend any amount of these corruption stacks to gain temporary hits points equal to twice the number of expanded stacks, forming a protective cocoon around you. Whilst you have these temporary hit points, effects that would kill you instantly or render you unconscious are negated. Once you expand this corruption stacks you return back to normal as you leave chaos' embrace.