This came up in my Sea of Blood campaign last night. The hero, Shiver, has aura 4. We are using feats from the TOI expansion and, sure enough, Shiver drew and played a feat providing aura 4 (until the end of his next turn). Does the aura stack; i.e,., does Shiver have aura 8 for a turn?
We decided to allow it since we couldn't find anything in the rules saying aura didn't stack. Can anyone think of a reason or point to rule that would lead to a different conclusion?