Legion

: You may cast spells with mana value equal to Legion's loyalty without paying their mana costs. Whenever you cast a spell that way, mill 4 cards.
-0: Draw a card, then discard up to two cards. Put a loyalty counter on Legion for each card discarded this way.
-4: Until end of turn, you can cast instant and sorcery spells from your graveyard. As a spell cast this way resolves, exile that card.