Ok, so basically!
Constellations are simply figures born from legends (be then from the human world or not), their power depend on how known they are. Their names are related to these legends, like Lee Jihye's sponsor is a korean well-known historic figure.
Stigma's are skills originally from your sponsor (constelation) that were transmited to you through your agreement with your constellation.
Skills are generated based on things you were already good or related to (like how YJH has the pro-gamer skill cause he used to be a pro-gamer).
There are more things but these will be explained better in the future and may contain spoilers.
AAAA THANK YOU (๑•ㅂ•)و✧ Things make a lot more sense now (￣∇￣")
Np (▰˘◡˘▰) glad i could help
I just wanted to add! This isn't a spoiler as it's been revealed in the earlier chapters but basically these constellations use modifiers whenever they send indirect messages to incarnations (incarnations being the humans on earth). Kinda like in actual streams where if someone sponsors you balloons their username pops up.
So yes, Modifier = Username
The constellations that had their name revealed that I can remember are:
The Archangel Uriel,Her modifier is Demon-Like Judge of Fire
And Sun Wukong,His modifier is Prisoner of the Golden Headband
Although I'm addicted, I still don't get some things TvT someone plz explain the whole constellians and stigma thing, and the characters' skills (like Jung heewon, Junghyuk, etc) Also the meaning behind the constellians' names. Also also how are war generals related to the constellians?? (ex. Lee Jihye's sponser). Ok I'm realizing I need the whole game system to be explained- So if anyone would be generous enough to drop some link or just directly explain everything to my peasant azz, I will be grateful ╥﹏╥