The mod includes five variations: regular brown cultist, green poison cultist, red flame cultist, blue ice cultist and a yellow sun cultist (uses lightning).
It also includes two additional cultists: a black "death cultist" and a "keymaster", which is a generic cultist monster originally created for the upcoming "One Room Round Robin 2" mod. The death cultist does not have an elemental attack of it's own, but the black color may be appealing, modify to suit your needs. The keymaster is similar to the poison cultist.
Install instructions are enclosed in the readme file, and are very simple, essentially just a copy paste and one code insert.
As always, I strongly suggest tweaking the monsters to suit your needs, these come fitted with the basic elemental attacks they represent, and have some slight differences in HP, speed etc.
Credit for the Grimrock Model Toolkit which was essential for this mod goes again to JohnWordsworth. The community as a whole provided valuable assistance as well.
Kuningas/Tursas