At the beginning of your upkeep, flip a coin. If you lose the flip, sacrifice Planar Chaos. Whenever a player casts a spell, that player flips a coin. If they lose the flip, counter that spell.
NM-Mint - $6.60
Lightly Played - $6.30
Moderately Played - $5.90
Heavily Played - $5.30
Damaged - $4.30
NM-Mint Non English - $6.60
Lightly Played Non English - $6.30
Moderately Played Non English - $5.90
Heavily Played Non English - $5.30
Damaged Non English - $4.30