Mirari, Warden of Argentum

When Mirari, Warden of Argentum enters the battlefield, it connives. Create a 1/1 colorless
Thopter artifact creature token with flying.
Imprint —Whenever you discard an instant or
sorcery card, you may exile that card from your graveyard.
You may cast spells exiled with Mirari by removing
a counter from a nonland permanent you control
in addition to paying their other costs.