He's from my universe. His name is Galactus. He eats entire planets. Those two beings you saw are his heralds. The Silver Surfer and Stardust. They help him find worlds to consume.

They both only have a fraction of his power and I didn't stand a chance against either of 'em even back when I was at full strength. When his former heralds teamed up with us against the bugs in the Annihilation War they could singlehandedly fight whole armadas to a standstill.