As priests use magic, coupled with prayers, for their healing, they are of course somewhat useless in magic-proof areas. Naturally, they do not like this, as they feel the duty to take care of their group at ALL times. They have therefore learned how to call on Gods to grant them healing power, bypassing magical means altogether, using only devout prayer and physical contact. This allows them to continue healing even in magic-proof areas. The downside is that this way of healing drains their mana faster, and is less effective than usual healing spells.