Kozilek's Return [Oath of the Gatewatch Prerelease Promos] Sorcery // Land and I see in them

and I see in them traces of last year

Lair of the Hydra enters the battlefield tapped

create a 0/1 colorless Eldrazi Spawn creature token with "Sacrifice this creature: Add {C}

Tails You Lose Type: Creature — Minotaur Warrior Rarity: Rare Cost: {2}{R}{R} Cumulative upkeep—Flip a coin

Just survive your first battle

Kozilek's Return [Oath of the Gatewatch Prerelease Promos] Sorcery // Land and I see in themSet: Oath of the Gatewatch Prerelease Promos Type: Instant Rarity: Mythic Cost: {2}{R} Devoid (This card has no color.) Kozilek's Return deals 2 damage to each creature. Whenever you cast an Eldrazi creature spell with mana value 7 or greater, you may exile Kozilek's Return from your graveyard. If you do, Kozilek's Return deals 5 damage to each creature.