The city boss sharktopus, killed from within her own mouth by bloodlust, a buzzsaw, and Carl's Protective Shell.
Lusca, the level-82 Octo-Shark City Boss, is undone from inside. Carl berserks her thousands of Juvenile Octo-Shark brood with a Potion of Bloodlust so they devour one another, then fires Protective Shell like a cannonball through her: the immovable sphere stops her dead, splaying her upper jaw backward over her own eyes and snapping cartilage. Katia Grim's rocket-driven Leatherface buzzsaw then pinwheels through her exposed snout and cleaves her tiny brain in two.
She dies on the ocean floor, building-sized and split, her wrecked jaw peeled inside-out — a five-crawler city-boss kill that earns the achievement 'Flex in the City.' The swallowed Akula remains lodged in her gullet.
A dead, building-sized shark-octopus on the green-lit ocean floor, upper jaw horrifically peeled back and split, a jagged red line cleaved along her skull.
The fifth floor's city boss, slain from within by the party's improvised weapons.