Hi! Sorry for the late reply! Unfortunately Pauper means common-only cards, so for the purposes of the Pauper format, running Yak Attack(which is an epic rarity card) would disqualify the deck.
However if you’re looking for similar decks that don’t have these restrictions I suggest searching the hub! It’s a known archetype and you should be able to find several lists that aren’t pauper.
Cheers!