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Tesak, Judith's Hellhound

Legendary Creature — Elemental Dog

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.