Every time the avatar takes damage, he loses hit points. If your HP score ever reaches zero, the avatar dies. When the avatar cleanses a shrine, his maximum hit points will be increased. Mana Casting and maintaining spells requires the avatar expend mana. The avatar may only cast a spell if his current mana is equal to or greater than the mana required to cast the spell.
Spells require five times their spell circle in mana to cast.
Some spells are called duration spells and require a constant influx of mana to keep them active. You can increase the avatar's maximum mana supply by doing good deeds. A short tune will play whenever the avatar does a good deed, and his maximum mana will be increased. The avatar can also increase his maximum mana limit by cleansing shrines. Once you arrive in Britannia, the small chest in the corner of the room in Stonegate will contain several pieces of equipment.