Sword of Kaldra [Mirrodin]Set: Mirrodin Type: Legendary Artifact Equipment Rarity: Rare Cost: {4} Equipped creature gets +5 +5. Whenever equipped creature deals damage to a creature, exile that creature. (Exile it only if it's still on the battlefield.) Equip {4} ({4}: Attach to target creature you control. Equip only as a sorcery. This card enters the battlefield unattached and stays on the battlefield if the creature leaves.)

Set: Fossil Unlimited Type: Fire Rarity: Holo Rare Retreat cost: Colorless

it produces colorless mana instead of white mana

Set: HeartGold & SoulSilver: Call of Legends Type: Colorless Rarity: Ultra Rare Retreat cost: Colorless

where X is the damage dealt by Arknight Ascendency

Set: Amonkhet Invocations Type: Enchantment Rarity: Mythic Cost: {2}{U}{U} Tap an untapped creature you control: Tap target artifact

Set: Alternate Art Promos Type: Lightning Rarity: Promo Retreat cost: Colorless

Set: Nintendo: Black Star Promos Type: Colorless Rarity: Promo Retreat cost: 2

Set: Visions Type: Sorcery Rarity: Rare Cost: {2}{G}{G} As an additional cost to cast this spell

Set: Eventide Type: Legendary Creature — Elemental Shaman Rarity: Rare Cost: {2}{B}{B} Whenever Ashling

Set: Black & White: Base Set Type: Water Rarity: Promo Retreat cost: Colorless

was a Taoist master and tutored his soldiers in those arts

Set: XY: Primal Clash Type: Metal Rarity: Ultra Rare Retreat cost: Colorless