Seymour, Mischief Maker

+2: Seymour, Mischief Maker becomes a 2/2 blue and black elf rogue with unblockable until the end of the turn.
-2: Draw three cards, then put one card from your hand on the bottom of your library.
-7: You get an emblem that says "Whenever a creature you control deals combat damage to a player, draw cards equal to the damage dealt.