Dictate of Mandos

Devoid (this card has no colour.)
When Dictate of Mandos enters the battlefield,
exile target creature or planeswalker until Dictate
of Mandos leaves the battlefield.
Spells with the same name as a card exiled by
Dictate of Mandos can't be cast.
"None who shall enter shall pass back through; until
Arda is changed and the world is made anew."