A monstrous race encountered in the depths of the Gygaxian Gyre, beneath Tarrasquestone

The city-state of Tir Fhortun has a bit of a problem. It has guilds, too many guilds, actually. And they aren't getting along.

Also known as the Daughters of Parmak, the Burning Ones, Maidens of the Skull, and other colorful terms. They are once mortal magic using women who have become twisted, evil, and undead.

A haint is a pursuing ghost, or a ghost that follows or chases the living, and comes from Southern vernacular. In the fantasy setting, a Haint is a semi-corporeal entity that exists, but is neither alive nor dead, and not undead or constructed. They are an enigma.

A tree bearing sickening fruit, a thing of horror turning its victims into undead servants.

The lich is a form of sentient undead who cannot be killed until the object containing their soul is destroyed. The Electric Lich borrows the concept and moves it into the CE

Archbishop Midas of the Jovian Temple was a scourge to necromancers of all kinds, from the genuinely malicious to those who were merely talking to the dead with the consent of the families, sending many to burn at the stake, so after his death they took their revenge...and created the Bone Idol.

Long after the fighting has come to an end on a battlefield it can still be dangerous to the unwary.

An ashen grey willow with pale leaved tendils obscuring it's gnarled trunk. Sitting in the mire of great swamps, rare even in it's natural environment. The Banshee Willow's bark is known to have magical properties. Travelers beware, these trees seem to attract ghosts and other unsavory undead.

A shuddering heap of corpses and rotting soil, Logeko the Vile is a demon of of death and decomposition

An explosion rocked the city walls as if a hundred mages unleashed their fury upon the peaceful people of Souls'e Province. An instant silence in the wake of the blast was nearly as loud as the noise that erupted right after as another series of explosions followed the first. Then the screaming began. Low at first, then became physical as if a wave of noise punched us all in the gut and sent us to our knees. Even the guards began running, screaming. 'The people, they... they are murdering everyone. The city has gone mad. RUN!!!'

PCs one way or another often end up disturbing tombs and barrows and robbing graves. So what might they find there?

The Regal Tombs of Orbis were the place where the richest of the rich were buried, and Bert was sure that if he could break in to a recent two-month old burial he would be wealthy for at least the rest of the year. Since tomb-robbing could get somebody the gibbet, he had gone alone, and now he cursed as he fought hand to hand with the bulbous, distended, decomposing corpse that had leapt up when he tried to steal the grave goods and now beat and clawed at him and swiped at him with a rapier. Every wound it inflicted on his body, he got a little weaker and to his horror, it grew a little stronger and a little less rotten. Not long afterwards, a seemingly living man left the tomb, leaving the body of a grave robber behind. A body that would soon rise...and walk...

The spell Animate Dead has existed for a very long time, with many variations. The spell Cadaverous Companion is another such variation, but it is tailored to the animation of companion animals, rather than human corpses

You can't miss it, it's eight feet tall, glows in the dark and breathes ghost flames. Even if you're blind it utters blasphemies and damnations, a black poetry of the underworld. If you're deaf and blind you can feel the cold in the air when they turn up.

Stronghold made for the liche Haukagaron. He was betrayed at the last and Castle Kaukenn was pulled into the Abyssal realms.

Known fully as 'Nind Vel'uss Tahcaluss whol nind ehmtu siltrin' or 'They Who Hunger for Their Own Flesh'

The Odaneimo Mountains aren't exactly the sort the bards talk about, they dont tear at the sky or trip the gods. They are still tall enough that you just can't go hiking over them. There are just two passes through them, Oshen Pass down in the south, and Zoran pass, in the north. It would be worth a pretty penny if someone could find a middle pass through.

Diad, Teamsters Guild-boss

'I knew Lwausf would be angry when we banished him, but I didn't see the whole undead-bearman-projectile thing coming. Looking back it was kind of inevitable. '

Prince Gorim, Lord of the Mounatian Hall at Silverspike

The unnatural offspring of a zombie father and a human mother.