Grindstone [Kaladesh Inventions] Tamiyo Spend this mana only to

Spend this mana only to cast a creature spell

Whenever a Mountain is tapped for mana

Set: Beta Edition Type: Enchantment — Aura Rarity: Uncommon Cost: {B} Enchant land

Set: Amonkhet Prerelease Promos Type: Creature — Dragon Rarity: Rare Cost: {3}{R}{R} Flying

Set: Arena League 1996 Type: Basic Land — Forest Rarity: Rare ({T}: Add {G}

Grindstone [Kaladesh Inventions] Tamiyo Spend this mana only toSet: Kaladesh Inventions Type: Artifact Rarity: Mythic Cost: {1} {3}, {T}: Target player mills two cards. If two cards that share a color were milled this way, repeat this process. "All attempts to halt the machine failed. We must find a way to repurpose it." Consulate engineer's log