Melanie, The Byanmage

+2: Skip an opponent's turn. Target creature you control gains +2/+2 counter and it gains first strike.
-6: Exile up to four cards each opponent controls. You may play two of them without paying it's cost. Skip all opponents' turn.
-12: Discard all cards in opponents' battlefield and graveyard. Every player returns to 20 life. You can play cards that are in your graveyard.