Blazing Conflagration

Requirements You're transformed into phoenix form by the monstrosity form spell granted by this feat

Effect You dismiss phoenix form while a fiery corona erupts from you as searing light. Each creature in a 10-foot burst takes (2 × half your level (minimum 16))d6 fire damage with a basic Fortitude save against your spell DC; creatures that critically fail are Blinded for 1 round. You gain 8d6 temporary Hit Points. At 18th level and again at 20th level, the burst deals an additional 2d6 fire damage, and you gain an additional 1d6 temporary Hit Points.