Acid Rain

A hazardous substance found on the Space Pirate Homeworld in Metroid Prime 3: Corruption. Acid Rain falls in unshielded areas of the Homeworld and kills Samus almost immediately if she is exposed to it without the Hazard Shield. Acid Rain can also lull gamers into a false sense of security because it seems to affect Samus's energy very slowly. This, however, is not true because it takes Samus's energy at a faster rate as her energy meter falls.