Essence Sliver [Time Spiral Timeshifted] Dragons of Tarkir Prerelease Promos you may search your library

you may search your library for an Elf card

Set: Coldsnap Type: Instant Rarity: Rare Cost: {5}{B}{B} You may exile two black cards from your hand rather than pay this spell's mana cost

Set: Portal Three Kingdoms Type: Creature — Ox Rarity: Uncommon Cost: {3}{G} Swampwalk (This creature can't be blocked as long as defending player controls a Swamp

then add one mana of any color

Set: Worldwake Type: Creature — Kor Artificer Rarity: Rare Cost: {1}{W} When Stoneforge Mystic enters the battlefield

Essence Sliver [Time Spiral Timeshifted] Dragons of Tarkir Prerelease Promos you may search your librarySet: Time Spiral Timeshifted Type: Creature Sliver Rarity: Rare Cost: {3}{W} Whenever a Sliver deals damage, its controller gains that much life. The slivers would survive, even at the expense of every other creature on Otaria.