Fireblast [Friday Night Magic 2001] Merfolk Wizard 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: Arena League 2003 Type: Basic Land — Island Rarity: Rare ({T}: Add {U}

Set: Commander 2016 Type: Enchantment Rarity: Uncommon Cost: {2}{W} Creatures can't attack you unless their controller pays {2} for each creature they control that's attacking you

Set: Khans of Tarkir Prerelease Promos Type: Instant Rarity: Rare Cost: {R}{W} The next time a source of your choice would deal damage to you this turn

Set: Ixalan Prerelease Promos Type: Artifact — Equipment Rarity: Rare Cost: {2} When Dowsing Dagger enters the battlefield

Fireblast [Friday Night Magic 2001] Merfolk Wizard You may spend blue manaSet: Friday Night Magic 2001 Type: Instant Rarity: Rare Cost: {4}{R}{R} You may sacrifice two Mountains rather than pay this spell's mana cost. Fireblast deals 4 damage to any target.