Melzargard

Towering and heavily built, this invader carries ashen gray skin and eyes the color of fresh blood. His flesh is malleable enough to stretch or resculpt his limbs at will. What sets him apart is a cluster of heads riding one frame, and any single head can break away to grow into a full body of its own. Tucked inside each one sits a tiny sphere, roughly the size of a marble, that anchors his healing; shatter that sphere and the head it belongs to perishes for good.

Every head that makes up Melzargard thinks and speaks in its own way. One communicates in clumsy, stripped-down phrases; another gushes approval at whatever the rest propose, treating each suggestion as brilliant. A third studies the fight with a cool, watchful eye, while a fourth is pure aggression, forever pushing to slaughter anything in the way. Presiding over the group is a leader head that weighs the others' input before it acts. Oddly, the fewer heads that remain, the sharper the survivors seem to speak, hinting that his wits and traits are parceled out among them. Whatever their differences, all of them crave violence and jeer cruelly at the people they face.

Rated at the Dragon tier, Melzargard ranks among the fleet's deadliest weapons, strong enough to fell the mighty Sky King in a single blow and stubborn enough that four S-Class heroes are needed to finally bring him down. His defining trait is relentless regeneration: five orbs are scattered through his forms, and only by smashing every last one can an enemy truly end him. He can also break into five separate bodies of matching strength, and fusing them back together stacks their power into far heavier strikes. That same pliable flesh lets him sprout wings for flight, along with blades, hammers, and extra arms to attack from any angle. He proves both freakishly powerful, tearing off Iaian's arm and briefly hurling Bang through rubble, and quick enough to press top heroes despite his bulk, while claiming to have lived past a century.

His downfall comes when Metal Bat pulps one head and spots the hidden orb inside it. The heroes turn that discovery against him, whittling his bodies down one at a time, and in the end Bang snatches the final orb mid-regeneration and crushes it, snuffing out the last head and killing the monster.