Referee Squad [March of the Machine] Creature Each creature you tap while

Each creature you tap while casting a legendary creature spell pays for {1} or one mana of that creature's color

Set: March of the Machine Commander Type: Enchantment Rarity: Rare Cost: {3}{R} Whenever a nontoken creature enters the battlefield under your control

Son of Yawgmoth

Some muses give birth to art and poetry

Referee Squad [March of the Machine] Creature Each creature you tap whileSet: March of the Machine Type: Creature Homunculus Rarity: Uncommon Cost: {2}{U} Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for {1} or one mana of that creature's color.) Vigilance When Referee Squad enters the battlefield, tap target creature an opponent controls and put a stun counter on it. (If a permanent with a stun counter would become untapped, remove one from it instead.)