Sol Ring [Commander 2017] 038 You may spend blue mana

You may spend blue mana as though it were mana of any color to pay the activation costs of Quicksilver Elemental's abilities

the Coalition Type: Creature — Elf Druid Rarity: Common Cost: {1}{G} As Quirion Elves enters the battlefield

Set: Commander 2017 Type: Enchantment Rarity: Rare Cost: {5}{G}{G} Whenever you tap a land for mana

Set: Dark Revelation Volume 4 Card type: Effect Monster Rarity: Rare Attack: 1000 Defense: 2000 When this face-down Defense Position card is destroyed and sent to the Graveyard

Sol Ring [Commander 2017] 038 You may spend blue manaSet: Commander 2017 Type: Artifact Rarity: Uncommon Cost: {1} {T}: Add {C}{C}. Lost to time is the artificer's art of trapping light from a distant star in a ring of purest gold.