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.
Near Mint - $10.25
Lightly Played - $9.75
Moderately Played - $8.25
Heavily Played - $6.25
Damaged - $5.25
Near Mint Non-English - $10.25
Lightly Played Non-English - $9.75
Moderately Played Non-English - $8.25
Heavily Played Non-English - $6.25
Damaged Non-English - $5.25