I had a test model for the Warrior Priests done ages ago and only recently actually finished the unit, such is the way with these things.
The Slann Warrior Priests are the elite warriors in the army and are limited in number. A unit of 10 is all you got in 3rd edition for your army, with the exception of the 4 Warrior Priests who guard a war altar if you took one.
They could can a 100pt magical standard, so I have represented this on the snake banner with some lightning bolts to represent a Divine Icon of Wrath spell. They can also carry a 25pt magical instrument and so I have given them a guy with the elaborate horn from a Citadel plastic goblin as the hands are about the same size.
In games they are fun, being subject to frenzy. It’s hard to get these guys to frenzy as their cool value was so high it was rare to fail the test. Mages have a better cool bonus than heroes so are a better bet to lead the priests if you wanted to get them to frenzy.
I painted them with sinister looking black war paint with red palms and feet to evoke the hands being drenched in blood. Most of them are carrying enormous hearts and sacrificial daggers. They have no pupil so they look more like glowing magical orbs that are the same colour as the highlight on the dagger.