Glass Casket
Artifact
When this artifact enters, exile target creature an opponent controls with mana value 3 or less until this artifact leaves the battlefield.
While Neva's mind wandered the realm of dreams, her body lay protected as mages worked frantically to find a cure for the Wicked Slumber.
Illustrated by
Wilds of Eldraine#16UncommonEnglishLegality
Rulings
If Glass Casket leaves the battlefield before its triggered ability resolves, the target creature won’t be exiled.
Auras attached to the exiled creature will be put into their owners’ graveyards. Any Equipment will become unattached and remain on the battlefield. Any counters on the exiled creature will cease to exist. When the card returns to the battlefield, it will be a new object with no connection to the card that was exiled.
If a token is exiled this way, it will cease to exist and won’t return to the battlefield.