Dakkon Blackblade

+2: Look at the top four cards of your library. Put two of them into your hand and the rest on the bottom of your library in any order.
0: Until end of turn, Dakkon Blackblade becomes an X/X Human Warrior creature with lifelink where X is the number of lands you control.
-X: Dakkon Blackblade deals X damage to target creature or planeswalker and you gain X life.