Monodia

+2: Monodia becomes a 5/5 Legendary Dragon token with flying, lifelink, indestructible, and hexproof until the end of turn. Draw a card.
-2: Take control of target non-land permanent. Sacrifice it at the end of the turn.
-7: Choose an opponent. Control that player's next turn. At the end of their turn, they discard their hand and the top seven cards of their library.