Sorry
I can work on the system for Verity
Verity:
First thing to narrow down is numbers:
Verity will be 2 (Dichotomy, True/False, ya know?)
So the warriors will have two abilities, one passive ability and one active ability. Before battle, or throughout their lives, Verity invests them depending on their truthfulness, improving the effects. They can sacrifice some of this investiture to have a "False" ability.