The Arcana of Invocation

The villagers take shelter in the church from the trolls. Shierke puts up a barrier around the church and that keeps the trolls out, but then an ogre and kelpie also appear in the village. Guts and Serpico go to deal with them to buy Shierke some time to deal with them. Shierke uses her magic and finds out that there used to be a shrine of a deity that protected this land...