The other are bugs that get pressed into the sheet after printing, which will not have printing on top of them when viewed under magnification
These serialized cards are printed in the language that each of the characters spoke, seen here on Leonardo da Vinci in Italian and Socrates and Cleopatra in Greek (with a cartouche in the flavor text for Cleopatra)
Its not the norm, but some LGSs accept that you proxy some cards or the whole deck even in prize-supported events
Subtlety shows up in decks like Temur Rhinos and Izzet Control, where keeping tempo and dodging sorcery-speed threats is everything
Overall, the new mechanics in Aetherdrift are hardly the most wild or innovative, but theyre nonetheless interesting
It has one of the largest power/toughness spreads for an all-upside creature, and it's the only legendary Spider that actually bestows some benefit to your other arachnids