Mirari, Warden of Argentum

When Mirari, Warden of Argentum enters the battlefield, create a 1/1 colorless Thopter artifact creature token with flying. Surveil 1.
Imprint —The first time you cast an instant or
sorcery spell with mana value 2 or less on each
of your turns, you may exile that card instead of putting it into your graveyard as it resolves.
{3}, {t}: Copy a card exiled with Mirari. You may
cast the copy without paying its mana cost.