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A mythical freak with god-like powers from some other universe. You can't see them, hear them, or even smell them. They're just there, making you feel like an idiot for even thinking about them.
"Kahacha is real. I swear. I saw it in my dreams. And I didn't even eat cheese before bed.", @DreamyDude420
"My dog says Kahacha is a real thing. And he's never wrong.", @DogLover4Life
"I tried to summon Kahacha with a magic spell. It didn't work. I probably did it wrong.", @SpellMaster69"