Sphere of Safety (280) [SLD - 280] Unfinity 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

Set: Sword & Shield: Fusion Strike Type: Grass Rarity: Ultra Rare Retreat cost: Colorless

you may add up to X mana of one color to your mana pool

Set: XY: Ancient Origins Type: Psychic Rarity: Ultra Rare Retreat cost: Colorless

Set: POP Series 2 Type: Grass Rarity: Common Retreat cost: Colorless

Sphere of Safety (280) [SLD - 280] Unfinity You may spend blue manaRarity: R #: 280 Creature Type or Sub Type: Enchantment Rules Text Contains: Creatures can't attack you or a planeswalker you control unless their controller pays X for each of those creatures, where X is the number of enchantments you control.