Dugashi - Cossack Loner

+6: Put one -4/-2 counter on target Cossack you control. That Cossack must attack this turn.
-1: All Cossack creatures you control gain vigilance until the end of your turn.
-7: All Cossacks you control gain double-strike and trample. They attack each turn. For each that dies, put a +1/+0 counter on all others.