Urban Dungeon Delving On An Abandoned Continent

[Jonagel]

Just commented on your monsters, in the original thread -- neat ideas!

Overall, this looks like a great world/module. Plenty of possible hooks, factions, etc. I especially like the dynamics with giants. Also gives the player a bit of clarity on how to progress:
1) Avoid western side/desert until level 10, giants can crit your rogue and one shot KO them if they're lucky
2) Avoid wandering towards the center too quickly (for all the aforementioned reasons)

Maybe the giants are doing so well in the desert because a family of Blue Dragon made it's home their, and they've banded together? From giant slaves to giant peasants under the rule of a Blue Dragon.

More random ideas!

Kingdom of Sylthriastar: With all sentient life gone, would these merfolk have scattered outposts all throughout the inner seas already? Unless they have a policy against it, in which case maybe some splinter groups have done so?

Eastern Islands: Seem like good candidates for volcanoes! Island chain, mountainous. Maybe a special forge is there? Maybe all of the access routes by sea are useless because they are tons of ship wrecks (due to sailors dying). Maybe a recent eruption has scared away airship travel (for the next few months)?

Random darker spots on the map: I know it's meant to be denser forests(?), but a few areas look extremely dark. Example, south center coast line just south of a lake, the northern edge of a inlet/bay. Maybe it's meant to be marshy, like the eastern coast with all the tiny lakes.... or maybe these can be areas that have already been deemed off limits/of no use? Entire area that was burned down, corrupted, etc?

Doomsday Prep: If anyone on the continent knew about the potential Rapture, maybe you have some special Bunkers, underground silos, doomsday prep like locations. Might make for nice treasure, a clue to "Why", or just a little depressing reminder?

Automated Library: With so much magic, maybe the PCs come across an automated (or AI) library that maintains a bunch of information?

Pirates!: Sure there are Commodore Osonye's sky pirates, but plenty of others might be trying their best outside the guild structure. Raiding a pirate cove (or coming across one while the pirates are away) might be fun. Eventually, this same concept could apply to a legitimate war between two guilds.

God-play: Come across sentient animals, AI, golems, etc. and be welcomed back as their creators...and expected to stay around forever

Evil? NPCs: Make friends with a wandering adventurer, who turns out to be a highly wanted criminal back at the home continent. A few months in, they start seeing his face on wanted signs all over town (as a ranger, he did always choose to camp in the wilderness while the party went to the city).

Floating Castle: With all that magical fun time, someone's bound to have made a flying castle (or tower, or more?!). Either these are crash sites, or the PCs can hear it happen one day as the energy runs out 20 years later.