Rereading the acotar series. I think Lucien's eye has wyrdmarks carved into it. He can see other worlds perhaps. Maybe Elain can see into other worlds too.
seen from Russia
seen from Finland
seen from Bangladesh
seen from Ecuador
seen from Lesotho

seen from India

seen from United Kingdom

seen from United Kingdom
seen from China

seen from United Kingdom
seen from United Kingdom

seen from United States
seen from United States
seen from United States
seen from China
seen from Syria

seen from Indonesia
seen from Germany

seen from Netherlands

seen from United States
Rereading the acotar series. I think Lucien's eye has wyrdmarks carved into it. He can see other worlds perhaps. Maybe Elain can see into other worlds too.
HOFAS SPOILERS
current pg: 692
"a golden mask sat upon her face, primitive but embossed with whorls and patterns so ancient they'd lost all meaning." acosf p. 371
did someone say whorls??? you know what i'm gonna say about that....
i also think it lines up with my previous mention of how feyre described the cauldron (well, a tapestry of the cauldron, but close enough) as being covered with ancient whorls and patterns. i'm just saying it would make sense for a made item to be inscribed with wyrdmarks if the cauldron itself has them.
plus, the powers of the trove do have wyrdmark energy.
The thing with annotating is that you really do miss out on info that you never really processed before.
Like so far in Throne of Glass and in Crown of Midnight, when it has mentioned using the Wyrdmarks, it's been said that you need to say a spell when casting it or it won't work.
But in later books, casting spells aren't mentioned again and the Wyrdmarks work fine on their own.
I'm not necessarily calling it a plot hole, but more of a retcon on SJM's part, because how else would Rowan be able to unlock Aelin's mask in Kingdom of Ash or how would Aelin be able to make it back home from the Wyrdgate if Rowan wasn't there to say the spell that brought her back home (to him!!!!!! Because Rowan is her home!!!)
Anyway, annotating has been interesting so far.
the lead door in the summer court protecting the book of breathings is marked with a whorl in the center of it, feyre mentions it feeling like it has been there for a long time. protected by wyrdmark?
other marks as mentioned in relation to getting the book and the book itself, once again, wyrdmarks??
"i rubbed my left forearm and hand, the entirety of which was now covered in swirls and whorls of black ink." acotar p. 335
okay, i know anytime i see the word 'whorls' i instantly think wyrdmarks, but hear me out on this one.
what if all the bargain tattoos have wyrdmarks ingrained in them?? and that's what makes them binding. like how if someone tries to go against the bargain they feel blinding pain from the mark, and if they break it, it kills them?? that sounds like some wyrdmark energy if you ask me.
"no--not sparkling, but. . .effervescent with small symbols, perhaps of some ancient faerie language." acotar p. 114
this description is about a mural that feyre finds in tamlin's library. it's of the cauldron which is being poured out onto the world and the golden contents contain symbols...wyrdmarks? am i just gaslighting myself into thinking that every mention of ancient symbols or whorls are wyrdmarks or has sjm just been leaving us crumbs this whole time?? idk.