The Mirari Conjecture [Dominaria Prerelease Promos] Treefolk Shaman Set: Oath of the Gatewatch

Set: Oath of the Gatewatch Prerelease Promos Type: Legendary Enchantment Rarity: Rare Cost: {1}{R} When Oath of Chandra enters the battlefield

you may search your library for a Plains card

They are the sleeper agents

Liliana developed a fondness for the moment when roaring becomes squealing

When Archangel Avacyn enters the battlefield

The Mirari Conjecture [Dominaria Prerelease Promos] Treefolk Shaman Set: Oath of the GatewatchSet: Dominaria Prerelease Promos Type: Enchantment Saga Rarity: Rare Cost: {4}{U} (As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.) I Return target instant card from your graveyard to your hand. II Return target sorcery card from your graveyard to your hand. III Until end of turn, whenever you cast an instant or sorcery spell, copy it. You may choose new targets for the copy.