Quote Originally Posted by Neftren View Post
at will = free action...?

Yeah, it only lasts 10 minutes. I'm thinking of throwing maybe an improved health regeneration in moonlight/starlight...
An action which is available "at will" has no limit to the number of times per day it can be used, save that it can only be used once per round. Whatever action or other option it is, it normally takes as long to use as it otherwise would, so a spell-like ability which corresponds to a spell with a casting time of "one action" still takes one standard action.