Saachi, pony master.

+6: Ask an opponent a riddle, if they get it right nothing happens, but if they get it wrong or don't answer you gain 6 life.
-6: Ask someone outside the game if they like my little pony. If yes you gain 6 life, if no a creature you control gets flying, trample, and lifelink
-6: Saachi, pony master deals 6 damage to target player, target player discards 6 cards, and sacrifice 6 permanents.