"Take up the quill, and feel your future flow into the runes."

Rubinia Soulsinger

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.

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 Soulsinger and Rubinia Soulsinger remains tapped.

ocT: Gain control of target creature. Rubinia does not tap or untap this creature. If Rubinia becomes untapped you lose control of this creature; you may choose not to untap Rubinia as normal during your untap phase. You also lose control of target creature if either Rubinia leaves play or you lose control of Rubinia.

Commander Anthology

Commander 2013

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.

Commander 2013 Oversized

Magic Online Theme Decks

Masters Edition III

You may choose not to untap Rubinia Soulsinger during your untap step.
{T}: Gain control of target creature as long as you control Rubinia and Rubinia remains tapped.

Chronicles

You may choose not to untap Rubinia Soulsinger during your untap phase.
ocT: Gain control of target creature. Lose control of target creature if Rubinia leaves play, if you lose control of Rubinia, or if Rubinia becomes untapped.