Gruul Spellbreaker
Creature — Ogre Warrior
Riot (This creature enters with your choice of a +1/+1 counter or haste.)
Trample
During your turn, you and this creature have hexproof.
She displays her scars with pride.
Zoltan Boros
Ravnica Allegiance Promos (PRNA)
• #179pRulings
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)
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)
Rulings
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)
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)