These Lovecraftian Supernatural Horror artworks were created for the tabletop RPG Silent Legions (from Sine Nomine Publishing). They are part of an art and map pack released into the public domain (and available for download from here).

This set is by Luigi Castellani and depicts:

• A woman is dead in bed
• A man riles up a crowd in a city
• Two armed people observe a dark ritual
• A tentacled monster is caught in a spotlight
• A surgeon or forensic scientist operates on a monster or alien
• A smiling man has a bullet hole in his head
• A sunglasses-wearing socialite is drinking wine
• A greaser in an alley way is ready to fight someone - or something
• Two sunglasses-wearing agents threaten a shopkeeper
• A man looks crazily at the magic between his hands
• A decaying hand reaches for a book, among other mystical items
• Two humanoid bugs examine things in an apartment, despite the dead person on the floor
• Frogfolk worship at an occult idol
• A strange alien landscape with a four-winged reptile and two suns in the sky
• A high priest or king has half his face covered
• A manic man in tie and shirt sits in a chair
• Three ritual symbols
• A female sorcerer stops knives in mid air
• A man's face turns alien
• A woman looks into a scrying clamshell. Behind her, formless humanoids.
• Pills and a bloody razor in a sink

The publisher writes:

All of the images in this folder have been purchased with full rights from their original creators and are being released for free use. Both personal and commercial usage of these images is allowed, though as a matter of courtesy I ask that you give credit to the original artists, each of whom have their names attached to the respective file names. You may redistribute these files if you wish, though I ask that you keep the file names unchanged so as to preserve proper attribution for other users and keep this use file with it so others can be certain of their permissable use.

Kevin Crawford
Sine Nomine Publishing
sine.nomein.pub@gmail.com
3/29/2015