Sliver Overlord [Scourge] Happy Holidays 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: Eldritch Moon Prerelease Promos Type: Creature — Eldrazi Horror Rarity: Rare Cost: {3} You may cast Eternal Scourge from exile

When the last is removed

Set: Planar Chaos Type: Enchantment Rarity: Uncommon Cost: {2}{R}{R} At the beginning of the end step

you may draw two cards

Sliver Overlord [Scourge] Happy Holidays You may spend blue manaSet: Scourge Type: Legendary Creature Sliver Mutant Rarity: Rare Cost: {W}{U}{B}{R}{G} {3}: Search your library for a Sliver card, reveal that card, put it into your hand, then shuffle. {3}: Gain control of target Sliver. (This effect lasts indefinitely.) The end of evolution.