[Dustin]

For divine abilities, Moonlight control could provide significant tactical advantage at night, if your enemies were all limned in moonlight while your friends are shrouded in darkness.

The deity seems to have a focus on protection from supernatural threats. Making the invisible (spirits, ghosts, demons, etc) visible seems appropriate, as does granting the ability to hurt or bind insubstantial enemies with hands or weapons (silver only?). Warding, banishing, and exorcism would seem to fit as well, with lunar symbolism added for effect ("Hold him down long enough for me to draw a crescent on his forehead!")