Donate decks deliberately give permanents they control to other players. Sometimes this is political generosity, but more often than not the "gift" is something with a significant drawback that its new controller would rather not have.
The classic example pairs Donate with Illusions of Grandeur, eventually leaving its new controller staring down a 20-life penalty. Demonic Pact can similarly be handed away before its lose-the-game ability becomes your problem, while Blim, Comedic Genius weaponizes unwanted permanents through combat.
