Abilities are depleted when iterrupted during casting
I was executing the power (race or birthsign ability), but got interrupted (crushed to the ground), so the spell wasn't cast. After that I was unable to cast the spell that day. The power ability should get depleted after succesfuly casted.
(RM-1482 from redmine: created on 2014-06-13 by Lord Berandas, , closed on 2014-07-22 by nobody)