Phoenix Pyre
Tier 1 Epic abjuration
Casting Time: 1 reaction, which you take when you take damage
Range: Self (20-foot radius, 100-foot-high cylinder)
Components: V, S, M (a phoenix feather)
Duration: Instantaneous
You immolate yourself in a massive blast of flame, dying instantly. Your body is destroyed and any equipment you were carrying vanishes in the flames. Creatures in a 20-foot-radius, 100-foothigh cylinder centered on your space must succeed on a Dexterity saving throw or take fire damage equal to your maximum hit points at the time you cast the spell. A successful saving throw halves the damage. At the end of your next turn, you return to life with half the hit points you possessed when you cast the spell and your body and equipment magically reform at the space where you cast this spell (or the nearest unoccupied space if that space is occupied).
At Higher Levels. When you cast this spell as a tier 2 Epic spell, you return to life with the same hit points you had when you cast the spell. When you cast this spell as a tier 3 Epic spell, you return to life at your maximum hit points.
Ref: ELCR p101