Mox Tantalite [Modern Horizons] Arlinn it becomes an Aura with

it becomes an Aura with "enchant creature put onto the battlefield with Necromancy

The night I think is best for hiding all

When Spellstutter Sprite enters the battlefield

Shuffle Beacon of Creation into its owner's library

You may have Phyrexian Metamorph enter the battlefield as a copy of any artifact or creature on the battlefield

Mox Tantalite [Modern Horizons] Arlinn it becomes an Aura withSet: Modern Horizons Type: Artifact Rarity: Mythic Suspend 3{0} (Rather than cast this card from your hand, pay {0} and exile it with three time counters on it. At the beginning of your upkeep, remove a time counter. When the last is removed, cast it without paying its mana cost.) {T}: Add one mana of any color.