Every time the Phoenix Force — or her host — suffers critical trauma or even death, she retreats into a cosmic egg to await rebirth. However, the Phoenix's reincubation demands time. Should the egg be fractured prematurely, it unleashes the Phoenix Force in a fragmented, unstable state. Furthermore, Tony Stark and Adam Warlock's research reveals the egg's interior functions as a conduit to the White Hot Room — the above place where the Phoenix Force was born. For Knull, the primordial darkness once defeated by light, this vulnerability transforms the Phoenix's death itself into a weapon of poetic devastation.
