The Acid Rain was a toxic rain storm that was caused by Toxzon, when he was in his Toxzon Acid form. He did this so he could poison the water supply of Copper Canyon (while it was in gas form) and to waste it off of the map, as his revenge on Max Steel, who arrested him in C.Y.T.R.O Attacks!. The Acid Rain could destroy anything, as acid does normally. Then it was later neutralized by Steel, who injected the antidote to Toxzon's Bio-Geneticist Suit, also turning Toxzon into Neutralized Toxzon, though neutralized Toxzon escaped through the sewer before Max Steel could catch him.
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