Merle, the Fierce

Haste, First Strike
When Merle attacks, put into the battlefield
three 1/1 creature wolf token tapped and
attacking, Merle gets +X+0 until the end of turn
for each other wolf or werewolf into the
battlefield under your control.
Whenever a creature an opponent controls die
put a +1+1 counter on Merle.
Counters remain on Merle as it moves to any
zone other than a player's hand or library.