Tesak, Judith's Hellhound {3}{R}

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, Judith’s Hellhound attacks, add {R} for each attacking creature.

3/3

en fr de ja 汉语 ⋮

Prints	USD	EUR	TIX
Murders at Karlov Manor Commander #36	$0.10	€0.26	1.77
Murders at Karlov Manor Commander #346	$0.26		1.74
View all prints →

You make the choice to have the creature with unleash enter the battlefield with a +1/+1 counter or not as it's entering the battlefield. At that point, it's too late for a player to respond to the creature spell by trying to counter it, for example. (2024-02-02)
The unleash ability applies no matter where the creature is entering the battlefield from. (2024-02-02)
A creature with unleash can't block if it has any +1/+1 counter on it, not just one put on it by the unleash ability. (2024-02-02)

Putting a +1/+1 counter on a creature with unleash that's already blocking won't remove it from combat. It will continue to block. (2024-02-02)
Count the number of attacking creatures when Tesak, Judith's Hellhound's last ability resolves, including Tesak itself if it's still on the battlefield, to determine how much mana to add. (2024-02-02)