Restless Reef [The Lost Caverns of Ixalan Prerelease Cards] Duel where X is the sacrificed

where X is the sacrificed enchantment's mana value

the exiled card’s owner may cast that card without paying its mana cost

You may cast the copy without paying its mana cost” and “If this creature would leave the battlefield

Ob Nixilis Type: Land Rarity: Rare Hideaway (This land enters the battlefield tapped

Each of those creatures gains "{4}: Remove a paralyzation counter from this creature

Restless Reef [The Lost Caverns of Ixalan Prerelease Cards] Duel where X is the sacrificedSet: The Lost Caverns of Ixalan Prerelease Cards Type: Land Rarity: Rare Restless Reef enters the battlefield tapped. T: Add U or B. 2UB: Until end of turn, Restless Reef becomes a 4 4 blue and black Shark creature with deathtouch. It's still a land. Whenever Restless Reef attacks, target player mills four cards.