Rubinia Soulsinger [Legends] Elemental Horse Set: Legends Type: Creature —

Set: Legends Type: Creature — Fungus Demon Rarity: Rare Cost: {5}{B}{B} When Mold Demon enters the battlefield

Set: IDW Comics 2014 Type: Sorcery Rarity: Rare Cost: {3}{U}{U} Search target opponent's library for an artifact card and put that card onto the battlefield under your control

" —Sorine Relicbane

Set: Kaladesh Prerelease Promos Type: Creature — Demon Rarity: Mythic Cost: {3}{B}{B}{B} Flying

and you may spend mana as though it were mana of any type to cast those spells

Rubinia Soulsinger [Legends] Elemental Horse Set: Legends Type: Creature —Set: Legends Type: Legendary Creature Faerie Rarity: Rare Cost: {2}{G}{W}{U} 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.