From publisher blurb:
Something's got to give. Kaennar and Kath’mar have tried to outmatch each other with their lich powers, for there can be only one lord of the swamp. The villages around this dangerous game have put up a bounty to end this charade. The Swamplands need to be clean of this magical duel, or they might suffer a different kind of astral conflict, one that could spill out to civilization. ls even in the deepest nights. While they are not as visible during the daytime, the lights glimmer with a magical glow.
System: D&D 5E
Recommended Average Party Level (APL): 8
General Theme: Undead, Mages, Necromancy
Setting: Any, Starlight Chronicles
Time - Sessions to Finish: x2 session (6-hours)
Lich Showdown is a Fifth Edition one-shot adventure for a party at level 8.