Soul Burn [Coldsnap Theme Decks] Mole Beast Set: The Brothers' War Commander

Set: The Brothers' War Commander Type: Artifact Creature — Sphinx Rarity: Rare Cost: {4}{U}{U} Flying

where X is the sacrificed creature's power

Set: The Brothers' War Type: Instant Rarity: Common Cost: {G} Target creature gets +3/+3 until end of turn

Bad blood between those two is a good deal for us

Soul Burn [Coldsnap Theme Decks] Mole Beast Set: The Brothers' War CommanderSet: Coldsnap Theme Decks Type: Sorcery Rarity: Common Cost: {X}{2}{B} Spend only black and or red mana on X. Soul Burn deals X damage to any target. You gain life equal to the damage dealt, but not more than the amount of {B} spent on X, the player's life total before the damage was dealt, the planeswalker's loyalty before the damage was dealt, or the creature's toughness.