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.
NM-Mint - $0.40
NM-Mint Non English - $0.40
Lightly Played - $0.40
Lightly Played Non English - $0.40
Moderately Played - $0.40
Moderately Played Non English - $0.40
Heavily Played - $0.30
Heavily Played Non English - $0.30
Damaged - $0.30
Damaged Non English - $0.30