[lch]

The items that leave horror marks are Mage Bane (96), Sceptre of Corruption (113), Robe of the Magi (173), Flesh Ward (187), Boots of the Planes (203), Soul Contract (227), Stone Sphere (241), Lifelong Protection (254), Lightless Lantern (256), Tome of High Power (276), The Forbidden Light (285), The Horror Harmonica (288), The Ankh (290), The Gift of Kurgi (296), Dimensional Rod (311).

I have shared what I know about the items with Edi and it might probably be in the next Dom3 DB release.