Ghostfire Blade [Ugin's Fate] SM103a Set: Mystery Booster Type: Artifact

Set: Mystery Booster Type: Artifact Rarity: Uncommon Cost: {4} Whenever an opponent discards a card

Set: Black & White: Plasma Storm Type: Lightning Rarity: Rare Retreat cost: Colorless

or another

Set: Innistrad: Double Feature Type: Enchantment — Aura Rarity: Uncommon Cost: {1}{B} Enchant creature

Set: Streets of New Capenna Promos Type: Legendary Creature — Bird Demon Rarity: Mythic Cost: {1}{G}{W}{U} Flying

Ghostfire Blade [Ugin's Fate] SM103a Set: Mystery Booster Type: ArtifactSet: Ugin's Fate Type: Artifact Equipment Rarity: Rare Cost: {1} Equipped creature gets +2 +2. Equip {3} Ghostfire Blade's equip ability costs {2} less to activate if it targets a colorless creature. If you fear the dragon's fire, you are unworthy to wield it.