Radiosynthesis

General Feat (Prerequisite: Level 4+)

You absorb energy directly from magical and natural radiation. You do not need to eat food. You also gain the following benefits:

Ability Score Increase. Increase your Constitution or Wisdom score by 1, to a maximum of 20.

Radiation Shield. Any radiant, necrotic, or lightning damage dealt to you is reduced by an amount equal to your Proficiency Bonus.

Bloom. As a Reaction after taking radiant, necrotic or lightning damage, gain Temporary Hit Points equal to your Constitution modifier plus your Proficiency Bonus. You may use this Reaction once per short or long rest.