Integra

Integra was the "ultimate soldier" according to its creators, the Dominion. Their most powerful weapon, its appearance was loosely based on Samus Aran, with a head most resembling her helmet. However, it was larger and bulkier than her, and had four arms, two normal and the other two Arm Cannons. It was resistant to Samus' Plasma Beam and capable of unleashing multiple Power Bombs at once. As it was about to finish her, Samus mocked its apparent lack of intelligence, as she planted a bomb in its Arm Cannon without it noticing. With increased strength, Samus finally destroys Integra by shooting it with a Super Missile.