Raevan Tempest

+1: Scry 1, then reveal the top card of your library. Target creature gets +X/+0 until end of turn, where X is that card's converted mana cost.
-2: Scry 3, then reveal the top card of your library. You draw cards equal to that card's converted mana cost.
-7: You get an emblem with "You have no maximum hand size" and "Whenever you scry, this emblem deals 5 to each creature target player controls."