Put a +1/+1 counter on target creature. It phases out. (Treat it and anything attached to it as though they don't exist until its controller's next turn.)
Near Mint - £1.00
Lightly Played - £0.90
Moderately Played - £0.70
Heavily Played - £0.50
Damaged - £0.30
Near Mint Non English - £1.00
Lightly Played Non English - £0.90
Moderately Played Non English - £0.70
Heavily Played Non English - £0.50
Damaged Non English - £0.30