Phoenixes Reset

Rejuvenating and burning power radiates within you, bestowed or gifted from a Phoenix. You gain the following benefits:

• As a bonus action, you can heal yourself for 1d4 hit points, per character level, equal to your proficiency bonus. You can do this once every short or long rest.
  The healing die changes every three levels by one die category. (1d4 at level 3, 1d6 at level 6, 1d8 at level 9, 1d12 at level 12, etc.)
• As a bonus action, you can sacrifice your hit points to gain magical motes of energy, in the form of spectral Phoenix Feathers. You take 1d10 fire damage for every feather you gain. You can then use the feathers to either heal or deal damage to any chosen creature within line of sight. Using your spell casting ability, or your Wisdom plus proficiency modifier to hit. The Phoenix feathers deal 2d8 healing or fire damage, per feather. 
• On command, the user can sacrificially drop their health to zero hit points and fail all death saves. Combusting into flames and exploding with cataclysmic force, you gain five feathers for every level your character has, exploding into a Death Burst. These Feathers each deal an automatic 20 points of either fire damage or healing points.
  Doing this action destroys the character, only through magic can they be revived.