I’ll go first.
A person seeks out a fey to get a warlock pact. The person doesn’t know, however, that they’re a sorcerer with strong fey ancestry that just hasn’t manifested yet. The fey obviously agrees to the “pact” and makes a ridiculous contract that the person agrees to. The person lives their entire life believing they’re a warlock when they’re actually a sorcerer. The only thing the fey did was help the person’s magicky shit manifest.
I’ve got an old AD&DII Character. She is a half-elven Thief/Wizard, but she is quite religious, too, basically a devout follower of Hanali Celanil. She often wears white & golden dresses like their priests, and also a real holy symbol (A heart-shaped golden brooch, given to her for a service). Because of that, she has often been mistaken as a cleric. Boy, are people in for a surprise when they encounter a “worthless” love cleric throwing fireballs or climbing walls…