Galactus

The Devouerer of Worlds!

Galactus is a "space god" of enormous power and infinite hunger, who appears as a giant compared to humans.  His hunger drives him from planetary system to planetary system, where with the help of his Heralds he locates suitable planets, transmutes the planet's energy into ant-matter,  and consumes the anti-matter.  

Galactus creates energy constructs known as Heralds, each one imbued with Cosmic Power, and deriving their powers from one of the four base elements of antiquity:

 

Galactus Energy Conversion Tower