We also have Clear a Path, which may be just the sideboard card you need sometimes, but is a bit of a stretch in the maindeck
They essentially all give you two extra turns, which is exponentially worse for your opponents
I can only expect that it was a Pokemon Center exclusive
By countering or destroying a blue spell or permanent, there is no end of uses for Pyroblast, so its no surprise that its one of the most expensive cards in Pauper
Paired with Dawn of Hope, Archivist of Oghma can be twice as practical thanks to gaining you life
One of the best ways to build this deck is to fill it with cheap evasive ninjas and hit your opponents, revealing expensive cards to put into your hand while dealing massive damage to your opponents