Kilyn, Elven General

+2: Untap each land you control, target land you control becomes a 3/3 green elemental creature with haste, reach and vigilance that is still a land.
-X: Put up to X lands from your hand onto the battlefield under your control untapped, then gain life equal to the amount of lands you control.
-10: Copy each non-land permanent you control for each land on the battlefield.