Ooz

Ooz is a slime initially located at Plague Deviser Marileth's laboratory in the House of Plagues in Maldraxxus. After completion of The Door to the Unknown, a now significantly larger Ooz can be seen hiding in a corner of the Seat of the Primus. In the Covenant Sanctum version of the Seat, Ooz—now shrunken back to his old size—can be found next to Marileth in the northwestern laboratory.