Have you ever placed an invisible projectile trap (to look like darts are firing out of walls) only to be disappointed when it only hits the PC when it rolls a 20 because the PC already has an AC of more than 20 and placeables cannot have any BAB? Well here is a relatively simple, if not slightly involved way of solving this problem. Lets suppose that we want a trap with a BAB of 10. To start with, download a creature hakpak from the vault which:- * does not appear in the CEP * you know you are not going to use in your module Personally I like this one by Magma Click Here