The Hallow Stone's powers can only be used while it rests on natural soil under the open sky. When placed in such a setting the Stone has the following characteristics:
- Unnatural creatures (summoned beings, undead, magical constructs, perhaps others), are hedged out of a 100 foot radius area around the artifact. Entering the protected area requires a Great test of willpower for such beings.
- Natural creatures (animals, and nature-based magical beings, perhaps others) within the same area of effect gain Great protection from all forms of mental attack (fear, charm, mind control, etc.).
- The beneficial effects of all healing magic within the area of effect are doubled.
- A Great test of magical lore research will reveal a ritual associated with Stone. The ritual requires the basin-like top of the Stone be filled with pure rainwater collected in a silver bowl. The water must then be blessed as the sun rises by a priest familiar with the ritual. Once the ritual is completed any weapon dipped into this water gains a Great damage bonus against unnatural creatures for four hours. This ritual can be performed once per day, provided materials required are at hand.