Despero Vs Starro Vs Zardor

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Who the hell is zardor?

I don't know Zardor well (he's an new character from Green Lantern Emerald Warrior). Starro the Conquerer *did* beat and behead Despero, and unless Zardor is incredibly powerful I see the same happening.

Vast psychic being with a flaming sword. he's trying to take over the universe and GLC.