Rubinia Soulsinger is a rare Legendary Creature — Faerie card from Commander 2013 Oversized (OC13), collector number 207. Current market price: — (foil $1.15), TCGplayer market prices via Scryfall.
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.