Luigi approaching the gas.

Amaranthine gas is a dangerous substance found in certain caves in Adventure Mode: The Subspace Emissary. When characters enter the purple mist, they quickly start taking damage at about 2% every half-second, depending on the difficulty. However, characters do not flinch while in the gas. Whenever amaranthine gas is present, there is always a switch nearby that, when hit, will temporarily clear the gas; the length of time the gas is deactivated depends on the difficulty and location.

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