Health Points
Health Points (HP) is how many points of damage you can recieve before dying.
Regeneration
Health Points are fully regenerated upon entering a Town or City. Health Points are also partly regenerated when picking up Health Orbs.
Modifiers
Equipment
There are several items in-game that modifiy HP when equipped.
Talents
There is currently one talent that modifiy HP.
Cards
There are currently three cards in-game that modifiy HP in some way. Two cards that modify max HP and one that modifies the amount of HP regained from collecting Health Orbs.