History
Galactus came to Earth once again, and this time the heroes had no way of stopping him. Galactus promised to spare the world if their powerful warrior was given to him as herald. They offered up Bruce Banner without consulting him, and Banner agreed, rationalizing that the Earth would forever be spared from the Hulk, who would only bring destruction to worlds already doomed. Empowered by Power Cosmic, Banner spent years as Galactus's heralds, during which he would send designs for colony ships to planets chosen in advance, so that they could save at least a portion of their population. Galactus tolerated the evacuation projects as long as they did not interfere with his herald's duties.

As Banner
Attributes
Powers
Power Cosmic: Additionally to all the powers he has as a Hulk, Bruce Banner was imbued with the Power Cosmic by Galactus, which is the source of several of his superhuman abilities.
- Self-Propelled Flight: Bruce is able to fly under an atmosphere as well as through space.
- Energy Projection: Bruce can project cosmic energy out of his fists as a destructive force.
- Energy Absorption: Bruce was able to beat Captain Marvel in combat by absorbing her cosmic energy.[1]