Sever the Bloodline [Innistrad] Wizards Play Network 2012 Set: Time Spiral Timeshifted Type:

Set: Time Spiral Timeshifted Type: Creature — Avatar Rarity: Rare Cost: {3}{G}{G}{G} As long as Gaea's Liege isn't attacking

Set: Core Set 2019 Type: Creature — Cat Warrior Rarity: Common Cost: {1}{W} The leonin of Oreskos are quick to take offense—not because they are thin-skinned but because they are always ready for a fight

where X is the sacrificed artifact's mana value

Set: Conspiracy: Take the Crown Type: Artifact Creature — Unicorn Rarity: Common Cost: {3} {T}: Add one mana of any color

Sever the Bloodline [Innistrad] Wizards Play Network 2012 Set: Time Spiral Timeshifted Type:Set: Innistrad Type: Sorcery Rarity: Rare Cost: {3}{B} Exile target creature and all other creatures with the same name as that creature. Flashback {5}{B}{B} (You may cast this card from your graveyard for its flashback cost. Then exile it.)