Mark of Mutiny
Sorcery
Gain control of target creature until end of turn. Put a +1/+1 counter on it and untap it. That creature gains haste until end of turn. (It can attack and 
this turn.)
The flame of anger is hard to douse once lit.
Mike Bierek
The List (PLST)
• #PCA-47Rulings
Mark of Mutiny can target any creature, even one that you already control or that is already untapped.
(wotc • 2017-11-17)
The +1/+1 counter remains on the creature after the control-changing effect ends.
(wotc • 2017-11-17)
Rulings
Mark of Mutiny can target any creature, even one that you already control or that is already untapped.
(wotc • 2017-11-17)
The +1/+1 counter remains on the creature after the control-changing effect ends.
(wotc • 2017-11-17)