The Heal spell enables the priest to completely cure all disease and/or injuries afflicting the target creature.
In-game description Edit
The very potent Heal spell enables the priest to wipe away disease and injury in the creature who receives the benefits of the spell. It completely cures all disease and blindness in the recipient and heals all points of damage suffered due to wounds or injury. It also dispels a Feeblemind spell and cures those mental disorders caused by spells or injury to the brain. Naturally, the effects can be negated by later wounds, injuries, and diseases.