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 - $1.60
Lightly Played - $1.50
Played - $1.20
Heavily Played - $1.00
Damaged - $0.80
Near Mint Non-English - $1.60
Lightly Played Non-English - $1.50
Played Non-English - $1.20
Heavily Played Non-English - $1.00
Damaged Non-English - $0.80