Yami Yugi

+1: Cast a creature spell from your hand with converted mana cost 4 or less without paying it's mana cost.
0: Sacrifice a nontoken creature to cast a creature spell from your hand with converted mana cost 5 or 6 without paying it's mana cost.
-2: Sacrifice 2 nontoken creatures to cast a creature spell from your hand with converted mana cost 7 or more without paying it's mana cost.