I thought I had a great idea put together but then realized an obvious bug.
I tried using the Undead's Haunted Mine ability to create the circle around a unit, so that I could get units with a modified undead gathering ability could gather around the unit and use triggers to make it like a ritual. The problem is that it changes the unit with the ability to a mine, so I couldnt make a good spell with it.
Is there a way to make it able to still make the circle around a unit without changing it, and if not, is there a way I could have a similar effect without completely running it with triggers?
From my knowledge... no! You will have to create the effects of the stuff on which the acolytes stay around the Haunted Mine around the unit itself at the precise points, then create the unit you want at those points and that should do it for the ritual circle.