Every player, forest monster, and master (including the Red Dragon) has Hit Points. To defeat an opponent, you have to attack them enough to reduce their Hit Points to zero or less.
Gaining Hit Points Edit
Each time you reach a new level, your Hit Points will increase by a standard amount.
Giving the Old Hag in the forest a gem will give you one Hit Point.
Giving the bartender at the Inn two gems and asking for a Hit Points potion will increase them by one.
Jennie HOTT will increase your Hit Points by 20%, however this is only temporary and they will return to normal once you take damage past your original level.