Clamor Shaman
Creature — Goblin Shaman
Riot (This creature enters with your choice of a +1/+1 counter or haste.)
Whenever this creature attacks, target creature an opponent controls can't block this turn.
"Little goblin. Big noise." —Ruric Thar
Tomasz Jedruszek
Ravnica Allegiance (RNA)
• #96Rulings
If a creature entering the battlefield has riot but can’t have a +1/+1 counter put onto it, it gains haste.
(wotc • 2019-01-25)
Riot is a replacement effect. Players can’t respond to your choice of +1/+1 counter or haste, and they can’t take actions while the creature is on the battlefield without one or the other.
(wotc • 2019-01-25)
If you choose for the creature to gain haste, it gains haste indefinitely. It won’t lose it as the turn ends or as another player gains control of it.
(wotc • 2019-01-25)
Rulings
If a creature entering the battlefield has riot but can’t have a +1/+1 counter put onto it, it gains haste.
(wotc • 2019-01-25)
Riot is a replacement effect. Players can’t respond to your choice of +1/+1 counter or haste, and they can’t take actions while the creature is on the battlefield without one or the other.
(wotc • 2019-01-25)
If you choose for the creature to gain haste, it gains haste indefinitely. It won’t lose it as the turn ends or as another player gains control of it.
(wotc • 2019-01-25)