Stifle
Counter target activated or triggered ability. (Mana abilities can't be targeted.)
"On a failed save, target creature falls asleep."
Instant
standard:
not legal
future:
not legal
historic:
legal
timeless:
legal
gladiator:
legal
pioneer:
not legal
explorer:
not legal
modern:
not legal
legacy:
legal
pauper:
not legal
vintage:
legal
penny:
not legal
commander:
legal
oathbreaker:
legal
standardbrawl:
not legal
brawl:
legal
alchemy:
not legal
paupercommander:
not legal
duel:
legal
oldschool:
not legal
premodern:
legal
predh:
legal
