Ob Nixilis, Opportunist

+2: You may sacrifice a land. If you do, Ob Nixilis, Opportunist deals 2 damage to target opponent and you gain 2 life.
-1: Draw a card. Until your next turn, prevent all damage dealt to Ob Nixilis, Opportunist.
-10: Create a 8/8 black Demon creature token with flying and indestructible. It has "At the beginning of your end step, gain control of target land."