Common Courtesy
Whenever a player casts a spell without asking your permission while casting it, counter that spell. When a player asks you permission to cast a spell and you refuse, counter that spell and sacrifice Common Courtesy.
"You didn't say the Magic word."
Enchantment
standard:
not legal
future:
not legal
historic:
not legal
gladiator:
not legal
pioneer:
not legal
explorer:
not legal
modern:
not legal
legacy:
not legal
pauper:
not legal
vintage:
not legal
penny:
not legal
commander:
not legal
oathbreaker:
not legal
brawl:
not legal
historicbrawl:
not legal
alchemy:
not legal
paupercommander:
not legal
duel:
not legal
oldschool:
not legal
premodern:
not legal
predh:
not legal
High - Low
