While preparing for their invasion of Earth, the Cotati called the Avengers for help, pretending they were at risk of being wiped out by the Kree/Skrull Alliance. When they arrived on the Blue Area of the Moon, the Swordsman convinced She-Hulk to come with him, stating that she would need a weapon to fight in the oncoming war.^[3] The Cotati, however, were lying, and bound her using Centaurian ironwood before killing her and planting a Cotati inside her body in order to infiltrate the Avengers.^[2][4]

The Cotati pretended to fight alongside the Avengers and the Fantastic Four as the She-Hulk, and learned that the Kree/Skull alliance planned to detonate the Pyre in order to wipe out the Cotati, even being rid of all life in the Sol system.^[5] When Mantis, Susan Storm, and Ben Grimm went to Lake Victoria to convince Quoi to abandon his genocidal war, the Cotati Hulk accompanied them. There it informed Quoi of the Pyre and revealed its ruse before attacking Ben Grimm.^[2]

The Cotati Hulk repeatedly focused on pummelling Ben rather than fighting Susan or Mantis, who weren't as powerful. Finding no other way to stop them, Susan had Mantis block all pain and fatigue signals from reaching her mind while she held the Cotati Hulk in her force field, in order to allow Ben to convince the real Jennifer to fight the Cotati inhabiting her body. Jen was able to come back to life with the help of the Leader, and fought against the Cotati controlling her after hearing Ben's words, purging them from her body completely.^[6][4]

Physical Transformation: The Cotati acquired She-Hulk's powers by taking over her body.

• Regenerative Healing Factor
• Superhuman Agility
• Superhuman Durability
• Superhuman Speed
• Superhuman Stamina
• Superhuman Strength: Far stronger than even Ben Grimm.^[7]
• Toxic Immunity