Thanks. The CBN on 12-Fingered Giant was confusing me, when played with CBN banding. It's basically saying that his ability can't be negated, as if played against Ira or captain of the host.
So, does household idols affect gathering of angels? The wording on the artifact makes me think it prevents banding via gathering of angels, but you mention gained abilities CBN.
The "play as" for household idols states "banding of heros is prevented. good banding cards are ignored". So an angel that's been set aside with gathering of angels is now a "good banding card", correct?