The-Bun-Geon

From the introduction: The necromancer Charly Bonebounce is performing a dark ritual at her cliff-to altar. The PCs are either looking for goodies in the area, or have been hired to stop her. Unknown to the PCs, the arch-demon Beelzebun'bun has charmed Charly and is using her to summon the souls of history's most heinous monsters into the bodies of cute bunnies.