Contagion Engine [Scars of Mirrodin] Battlebond Prerelease Promos 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

If that player doesn't

Players may spend mana as though it were mana of any color

damage that would reduce your life total to less than 1 reduces it to 1 instead

This spell can't be countered

Contagion Engine [Scars of Mirrodin] Battlebond Prerelease Promos You may spend blue manaSet: Scars of Mirrodin Type: Artifact Rarity: Rare Cost: {6} When Contagion Engine enters the battlefield, put a 1 1 counter on each creature target player controls. {4}, {T}: Proliferate, then proliferate again. (Choose any number of permanents and or players, then give each another counter of each kind already there. Then do it again.)