Mox Amber (Retro) [The Brothers' War Retro Artifacts] Delta Species and you can't play Unison

and you can't play Unison Cards for the turn

then put the card back or put it into your graveyard

(Look at the top two cards of your library

Set: The List Type: Legendary Enchantment Creature — God Rarity: Mythic Cost: {3}{U}{B} Indestructible

Set: Portal Three Kingdoms Type: Sorcery Rarity: Rare Cost: {4}{R}{R} You destroy four lands you control

Mox Amber (Retro) [The Brothers' War Retro Artifacts] Delta Species and you can't play UnisonSet: The Brothers' War Retro Artifacts Type: Legendary Artifact Rarity: Mythic Cost: {0} {T}: Add one mana of any color among legendary creatures and planeswalkers you control. A moment in time made tangible, it has the power to realize epic visions.