If target creature has toughness 5 or greater, it gets +4/-4 until end of turn. Otherwise, it gets +4/-X until end of turn, where X is its toughness minus 1.
NM-Mint - $13.70
Lightly Played - $12.40
Moderately Played - $11.00
Heavily Played - $9.60
Damaged - $6.90
NM-Mint Non English - $13.70
Lightly Played Non English - $12.40
Moderately Played Non English - $11.00
Heavily Played Non English - $9.60
Damaged Non English - $6.90