You may choose not to untap Rubinia Soulsinger during your untap step.
{T}: Gain control of target creature for as long as you control Rubinia and Rubinia remains tapped.
Near Mint - $16.25
Near Mint Non-English - $16.25
Lightly Played - $15.50
Lightly Played Non-English - $15.50
Moderately Played - $13.00
Moderately Played Non-English - $13.00
Heavily Played - $9.75
Heavily Played Non-English - $9.75
Damaged - $8.25
Damaged Non-English - $8.25