Tales and Chronicles
Jewel of the North, formerly know as vincegetorix
Well, I think orcs would still recognize the fact that gods were a thing. But since in my FRs gods are now silent and removed, I think having them ''try a new thing'' to avoid being shackled to another ungrateful god could make sense.That is the one issue I'm having. I like the idea of ancestor spirits, and that could still be a part of it. But the orcs know gods are real and they have worshiped them. It would seem odd to drop that completely. If they had been a separate group that never knew of the gods, that would be different.
So I am back tracking form my initial thought to suggest ancestor spirits and instead suggest "converting" some of the orc pantheon. Re-brand them so to speak. It is like how the Greeks basically despised Ares, but to the Romans Mars was 2nd only to Jupiter / Zeus. Mars was basically the same god, but modified slightly and glorified instead of derided.
I could see paths for worship of: Ilneval, Luthic, & Shargraas. Heck, even Yurtru and Gruumsh with a bit more work. They worship different aspects of the gods. These are not the old testament gods of wrath, but the new testament gods of peace and forgiveness. Same gods, different outlook.
Maybe under the teaching of the Silver Witch, they could have found another side to the usual orc pantheon. Maybe in their new faith, Obould went to orcish heaven and add a talk with the other gods and convinced them to change their ways a little. So the orcs pantheon would exist in two time: the Kingmaker Faith (the pantheon under Obould) and the Thronebreaker Faith (Under Grummsh)
Baghtru: Strengh, Courage, Competition, Oxen
Ilneval: Protection, Strategy, Craft
Luthic: Protection, love, hearth, Sacrifice, Bears
Yurtus: Healing, Death, Burial
Shargaas: Night, Moon, Travel
Grummsh: Fury, desctuction, the ''old ways''