Was he really stellar-class?

"Impossible!" The stellar-class powerhouses of the Oa Pan-Stellar Domain Alliance watched with pupils contracted in shock as Heat Vision pierced the core of the Flame Energy Being, a fellow stellar-class powerhouse, and forcibly smoothed out the space around him. The Flame Energy Being's death was too bizarre. There was none of the explosive force, chaos, or vastness of a stellar-class powerhouse and his star-like energy.