At the beginning of your upkeep, change Halfdane's base power and toughness to the power and toughness of target creature other than Halfdane until the end of your next upkeep.
NM-Mint - $27.80
NM-Mint Non English - $27.80
Lightly Played - $26.40
Lightly Played Non English - $26.40
Moderately Played - $25.00
Moderately Played Non English - $25.00
Heavily Played - $22.20
Heavily Played Non English - $22.20
Damaged - $18.10
Damaged Non English - $18.10