Prax, the Turbulent Mind

+1: Scry 4, then draw a card, and reveal it. If its a land card gain 3 life, if its a creature card, target player scarifices a creature.
-2: Draw two cards and reveal them. If any are instant or sorcery spells, discard two cards. You may play them without paying their mana cost.
-7: Return all opponents creatures to their hand. For each card returned, return one card from your graveyard to your hand.