Error Cards Certain cards have spelling errors, formatting issues, misprints, or other mistakes that turn an otherwise unremarkable card into a rare collectors item
In fact, dropping it to one mana helped speed up filling your graveyard
The first effect is a "level down" effect, where, if a friendly Link Monster (for "Gashadokuro") or Synchro Monster whose original Level is 2 higher than themselves (for all except "Gashadokuro") is destroyed by battle or an opponent's card effect, they can banish 1 other Zombie monster from GY to Special Summon themselves from the GY
For example, the Darkrai Holo #105 (Trick or Trade) in PSA 10 condition sold for $50, a significant jump from ungraded versions that often sell for much less
These initial cards are now known as the "first generation," and they can go for a lot of money