Greymane, The Lycan King

Eminence—Whenever a Wolf or Human Werewolf
you control dies, if Greymane, The Lycan King is in the command zone or the battlefield It becomes night. Then transform any number of Human Werewolves you control.

Intimidate, Double Strike

{t},Sacrifice a creature: Put a +1/+1 counter on each werewolf you control.