Dormammu

Stark snapped his fingers, and two treasures floated before him. One was a red gemstone. The other was a rod resembling a toilet plunger, with an eye embedded in its center. "The Crimson Gem and the Evil Eye of Avalon. I plan to install both of them onto the Anti-Dormammu Armor. That way, even within the Dark Dimension, I'll be able to draw upon the power of Cyttorak's Crimson Dimension. I can use that energy to enhance all my abilities and temporarily reach a level close to yours.