Tesak, Judith's Hellhound
From Murders at Karlov Manor Commander set
Tesak, Judith's Hellhound
Legendary Creature — Elemental Dog
3/3
Unleash (You may have this creature enter with a +1/+1 counter on it. It can't block as long as it has a +1/+1 counter on it.)
Other Dogs you control have unleash.
Creatures you control with counters on them have haste.
Whenever Tesak attacks, add
for each attacking creature.