How does an improvement potion work?
An improvement potion increases your hitpoints, spellpoints, or your grace, permanently. It does this by rerolling the rolls for your hitpoints, spellpoints, or grace, and increasing it. This way, if you drink enough improvement potions, your hitpoints, spellpoints, or grace would be as if you rolled perfectly. However, only lower levels roll for hitpoints, spellpoints, or grace. After level 10, skills increase hitpoints, spellpoints, or grace by a certain fixed amount.
