I'm running a campaign with my friends centered around the undead. Anyone got some idea's for some adventures for about level 4 players. Thanks for your help
There's a wondrous undead hazard (Worthy Sacrifices of Draj) in the Dark Sun creature catalog, also 9th-level, and I have some evil cleric NPCs of 5th-level or so if you need them. (They all use the Shroud of the Grave trait, although you could rename it Bolster Undead, which causes undead in the aura to lose their vulnerability to radiant damage.)