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Key (Biohazard) detail

The Key is used during the Biohazard quest. During the quest, it is dropped after killing the level-13 Mourner on the 1st floor[?] of the Mourner Headquarters in West Ardougne. It opens a gate to give access to a room full of crates, one of which holds a distillator.

This item is useless after the quest, and players may wish to drop it to conserve bank space.