After episode 30, Herobrine pretends to be good, but he's actually planning something evil in collaboration with the lucky block spirit and Powers. (Powers is my name for Second's powers personified. Creative, I know.) Red finds out, and Hero essentially threatens him into staying quiet. One day, Sec's powers make a return appearance...
Yellow, Blue, Green, and Second "turn evil". Yellow gets possessed by the lucky block spirit, Green uuuuhhh i guess he just gets possessed by the lucky block spirit too, Second gets possessed by Powers, Blue eats one too many Netherwart (this might be the witch's fault) and they attack Red in hopes of the lucky block spirit possessing him as well. Red grabs the creative block and runs, finds his way to the monster school, where he, Herobrine, and the rest of the monster school launch a resistance against the Broken Rainbow, as Yellow, Green, Blue, and Second are calling themselves. It all boils down to a final confrontation in the middle of the now mostly destroyed sticksfight.com website, and Red somehow manages to shock Second out of it. Sec helps Red free the other 3, but the lucky block spirit gets kinda pissed and faces off against Herobrine. I have to figure out how all that ends, but I know that Sec essentially uses so much of his powers that he pretty much forgets everything, ever. Yeah, it's not permanent though. He eventually learns to trust the color co, and as he starts remembering everything and the rest of the color co recover from the Broken Rainbow arc, stuff happens, they talk, it's all cool.