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 - $11.50
Lightly Played - $11.00
Moderately Played - $9.25
Heavily Played - $7.00
Damaged - $5.75
Near Mint Non-English - $11.50
Lightly Played Non-English - $11.00
Moderately Played Non-English - $9.25
Heavily Played Non-English - $7.00
Damaged Non-English - $5.75