Akari, Squall Savant

Whenever you cast a Giant spell or copy a spell, exile the top X cards from the top of
your library, where X is the number of spells
you have cast this turn. During your turn,
you may cast spells from among the cards exiled with Akari, Squall Savant as long as
they remain exiled.

Ragtag crew (You can have two commanders
if both have ragtag crew.)