You may choose not to untap Helm of Possession during your untap step. {2}, {T}, Sacrifice a creature: Gain control of target creature for as long as you control Helm of Possession and Helm of Possession remains tapped.
Near Mint - $3.40
Lightly Played - $2.70
Moderately Played - $2.40
Heavily Played - $2.10
Damaged - $1.70
Near Mint Spanish - $3.40
Lightly Played Spanish - $2.70
Moderately Played Spanish - $2.40
Heavily Played Spanish - $2.10
Damaged Spanish - $1.70