Kreigar, Soldier for Hire

First strike, Vigilance
Kreigar, Soldier for Hire's power is equal to the
number of mercenary creatures you control.
{r/w}, Sacrifice X treasure tokens: Reveal the top
card of your library until you reveal a Mercenary
permanent with the mana value of X. Put it onto
the battlefield, and the remaining revealed cards
on the bottom of your library in a random order.