@Weaken - Good point. I changed it to half the AP cost rounded down. o 3o
@Horrific Wail - I really grew to like Shrewdie's idea for Horrific Moan, so I decided to implement it as a separate Restricted Trait. The point of both Traits is to be severely debilitating in the case that it hits.
If you thought Horrific Moan was 'severely overpowered', why didn't you say something?
In any case, I'm not against bumping Horrific Moan to Restricted and Horrific Wail to Shrine (although I'll have to figure out what demi-god gets to grant it – maybe that's an excuse to make more Shrine Traits? Heehee). As for a limit on Shrine Traits... I don't think I'd limit it to just one. I'd probably allow two (one offensive, one defensive) or something along those lines.