Phoenix Resilience

You have endured the scorching touch of a phoenix ember crystal, granting you resilience in the face of death. When you drop to 0 hit points but are not killed outright, you can choose to either become incapacitated or invoke the power of your Phoenix Resilience, gaining the following benefits:

• You regain hit points equal to your level multiplied by your Constitution modifier.
• Roll a d4; you remain conscious for a number of combat rounds equal to the number rolled. If you are out of combat, each number rolled equates to 6 seconds.
• All your damage rolls include an additional 1d6 fire damage.
• After the duration determined by the d4 roll ends, you fall to 0 hit points and suffer 1 point of exhaustion.
• If you choose to become incapacitated during this event, a fiery explosion emanates from you. Each creature in a 20-foot-radius sphere centered on you must make a DC 15 Dexterity saving throw, taking 22 (4d10) fire damage on a failed save, or half as much damage on a successful one. You are unharmed by this explosion.