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 - $4.25
Lightly Played - $4.00
Moderately Played - $3.25
Heavily Played - $2.75
Damaged - $1.75
Near Mint Non-English - $4.25
Lightly Played Non-English - $4.00
Moderately Played Non-English - $3.25
Heavily Played Non-English - $2.75
Damaged Non-English - $1.75