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.
2013-04-15
wotc
The unleash ability applies no matter where the creature is entering the battlefield from.
2013-04-15
wotc
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.
2013-04-15
wotc
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.
2012-10-01
wotc
The damage dealt by the last ability is equal to Hellhole Flailer's power when it was last on the battlefield. For example, if it had a +1/+1 counter on it, it will deal 4 damage.
Format Legality
Standard
Not Legal
Future
Not Legal
Historic
Not Legal
Timeless
Not Legal
Gladiator
Not Legal
Pioneer
Legal
Modern
Legal
Legacy
Legal
Pauper
Not Legal
Vintage
Legal
Penny
Legal
Commander
Legal
Oathbreaker
Legal
Standardbrawl
Not Legal
Brawl
Not Legal
Alchemy
Not Legal
Paupercommander
Not Legal
Duel
Legal
Oldschool
Not Legal
Premodern
Not Legal
Predh
Not Legal
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