Grey Matter Seaman

+3: Mill the top 5 cards of your deck, you may cast 1 of these cards without paying its mana cost, and any number by paying their cost.
0: Create two 1/1 elf creature tokens.
-12: You gain an emblem: At the beginning of combat on your turn, create X 1/1 elf creature tokens w/ haste, where X is the number of lands in play.