Kefnet's Monument [Amonkhet] Lammasu you may return target enchantment

you may return target enchantment card from your graveyard to the battlefield

"As far as I can tell

−X: Exile each permanent with mana value X or less that's one or more colors

if you control at least five other Mountains

Set: From the Vault: Exiled Type: Instant Rarity: Mythic Cost: {U} Search your library for an instant or sorcery card

Kefnet's Monument [Amonkhet] Lammasu you may return target enchantmentSet: Amonkhet Type: Legendary Artifact Rarity: Uncommon Cost: {3} Blue creature spells you cast cost {1} less to cast. Whenever you cast a creature spell, target creature an opponent controls doesn't untap during its controller's next untap step. "The worthy shall cultivate a nimble mind to perceive the glorious wonders that await them." Monument inscription