Oblivion Sower [Battle for Zendikar Prerelease Promos] Legendary Enchantment Artifact You get an emblem with

You get an emblem with "You may cast spells from your hand without paying their mana costs

dragons rage

sacrifice Helm of Obedience and put one of them onto the battlefield under your control

If both targets are still legal as this ability resolves

Oblivion Sower [Battle for Zendikar Prerelease Promos] Legendary Enchantment Artifact You get an emblem withSet: Battle for Zendikar Prerelease Promos Type: Creature Eldrazi Rarity: Mythic Cost: {6} When you cast this spell, target opponent exiles the top four cards of their library, then you may put any number of land cards that player owns from exile onto the battlefield under your control. The Eldrazi hunger without limit and consume without pause.