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In a desolated mountainous forest, there is an area that is being kept clear of vegetations and other shrubs. There are ancient, very large stone slab. So ancient in fact that nobody knows where there are from.
Any humanoid slain within a mile from this location rises as a zombie and comes to this site to keep it clear from vegetation.
The site is a well known legendary spooky site, and many theories have been made to offer explanation for the slabs and the curse animating these zombies. Adventurers often go near it, if only to destroy the zombies gathering there (typically 0-5).
The truth? The site is an alien landing site. And eventually, they arrive
They are pretty immune to anything except an overload of energy (lightning bolts accelerates them, up to twice their hit points in lightning bolt where they bust).
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All the details above where in my dream. That’s what you get when getting to bed and reading for your game tomorrow.
One second thought, this hook could include illithids, or doppelganger plants.
Going back to reading Harry Potter tonight
Joël





