Training Grounds (Showcase Halo Foil) [March of the Machine: The Aftermath] War of the Spark Promos Sacrifice one or more artifacts:

Sacrifice one or more artifacts:

Set: Dominaria Prerelease Promos Type: Legendary Artifact — Vehicle Rarity: Mythic Cost: {4} Flying

Set: Secret Lair Drop Series Type: Legendary Creature — Mutant Hero Rarity: Mythic Cost: {1}{G}{U}{R} Flying

Paradox - Whenever you cast a spell from anywhere other than your hand

Set: Tenth Edition Type: Instant Rarity: Rare Cost: {4}{U}{U} End the turn

Training Grounds (Showcase Halo Foil) [March of the Machine: The Aftermath] War of the Spark Promos Sacrifice one or more artifacts:Set: March of the Machine: The Aftermath Type: Enchantment Rarity: Rare Cost: {U} Activated abilities of creatures you control cost 2 less to activate. This effect can't reduce the mana in that cost to less than one mana.