Since these errors exist in the digital file used for printing, every copy of the card from that run ends up with the same mistake
For instance: Creatures (16) Lands (22) Spells (22) Sideboard Kotiranta knew his opponents would have a lot of sideboard hate for his fast black aggro deck, but Entomb + Reanimation spells + Vampiric Tutor to help set it up, let him transform into a combo deck that would surprise people with a quick Avatar of Woe or Phantom Nishoba, leaving them looking at the Shock in their hand in disbelief
Heck, the latter is a Legacy staple these days
So far, weve seen job cards for the likes of Dragoon, Summoner, Black Mage, and White Mage, each of which has its own effects and boosts
They're designed for exactly this situation: someone who wants a fun, contained opening experience without spending a lot