Dawn broke with chaos—Trask's forces stormed: antidote drones swarming, Prime Sentinels gleaming, a colossal mech flanked by armored mutants, cannons blazing. The enforcer's voice roared: "Your sanctuary ends—cure or die!"Bill faced them, Captain Universe surging—cosmic energy flared, a blast shattering drones midair. "This is our home," he boomed, voice echoing with Uni-Power. Clara and Lily rallied—vibroblade and fire ready—Lena's mutants joined: Rok's stone fists, Buzz's wings, Ellie's sparks, Spike's quills.Drones fired—Bill webbed them with cosmic-enhanced agility, Upgrade merging—blasts turned explosive. Sentinels charged—Captain Universe punched, cosmic strength crumpling steel—Rok piled in, stone meeting metal. The mech launched antidote missiles—Bill's cosmic senses tracked, energy beams vaporizing them—Lily's fire wall shielded stragglers.Armored mutants rushed—Bill swapped to Four Arms, four fists smashing—then Hulk roared, green bulk raging—templates clashing, strain spiking. The enforcer laughed, mech stomping—Bill's resolve hardened, comics' World War Hulk meeting Ben 10's might. The system chimed:
"Template Fusion Initiated: Hulk + Four Arms. Quadra-Hulk—four-armed gamma strength, amplified durability. Trigger: Ultimate protection."Bill fused—green skin, four massive arms, gamma power surging—ten feet tall, a titan of rage and might. "You don't touch them!" he thundered, voice a dual growl—Hulk's fury, Four Arms' depth. He charged—two fists smashed the mech's chest, two ripped its cannon—cosmic echoes lingered, boosting his leap.Sentinels swarmed—Quadra-Hulk roared, four arms swinging—two crushed a Sentinel, two hurled it into drones—Upgrade flowed, enhancing debris into bombs. Clara's vibroblade slashed—Bill merged, cosmic energy sharpening it—Lily's fire melted armor—Quadra-Hulk stomped, gamma shockwave scattering foes.The mech fired—Bill caught the blast with four hands, cosmic senses guiding—Hulk's rage flung it back, exploding its core. Armored mutants injected antidote—Captain Universe surged, energy purging it—Quadra-Hulk returned, four fists pummeling—Rok and Spike joined, stone and quills piercing.The enforcer ejected—Bill webbed him with cosmic agility, Quadra-Hulk slamming him down—SCP-173 snapped his mech's remains unseen. The enemy broke—Sentinels ash, drones wreckage—Bill reverted, panting—cosmic glow fading, gamma bulk shrinking, Upgrade stabilizing him.Clara and Lily rushed him—Lena's mutants stared, stunned. "You're… unreal," Lena said."He's ours," Clara grinned, hugging him—Lily's glow warmed his side.The system chimed:
"Host emotional state: Exhausted but victorious. Templates utilized: Captain Universe, Upgrade, Hulk + Four Arms (Quadra-Hulk), SCP-173. Physical status: Strained but stable. Objective: Protect expanded haven."The haven stood—walls dented, moat low—but thriving. Bill sank, family and mutants around him—cosmic power, gamma might, their love—Trask's cure defied again.