Thursday nights game is a homebrew 5e game in the elf kingdom "Mist Veil" which is under attack by Nebikanezzar, a black half dragon and the armies and dragons he controls. At the same time portals deep in the second layer of the underdark are letting creatures from the Shadowfell into the prime material plane ripping through anything breathing they come across. My players current mission is to return through the teleportation circle back to Lapis Mons and help their elf friends break the siege and drive off or kill the orcs, manticores and dragons trying to take it.