The 19th Life Potion

There are 18 Life Potions sold by wise women in the game, and you start with another, putting your theoretical maximum at 19 Life Potions. However, there is a way to break this maximum, after a fashion. This is quite clearly a bug, but it is a very useful bug to exploit.

Normally, when you would die, Mea restores you to a fraction of your life. For whatever reason, if you have 19 Life Potions, the game cannot correctly calculate what this fraction should be. The bad news is that, with 19 Life Potions, Purple Mea is basically worthless—it will restore you to 0 life, effectively giving you a single extra hit before you die. The good news is that Green Mea will restore you to well over your maximum life.

This is a well-known glitch, but what isn't so well known is that you can get even more life—up to 100 Life Potions worth. If you go to Randar or Enny when you have more than 19 Life Potions, they will continue to heal you. Randar will heal you for 32 Life Potions at a time. Don't get greedy, though—if you get to 100 Life Potions, they will reset back to 0. You can keep healing back to your original 19, but that defeats the benefits of this glitch. Of course, you can always buy more Green Mea and do it again!

Having this much life makes the game trivially easy, so it may be more fun not to buy the 19th Life Potion. It's pretty clear the game was created with a maximum of 18 in mind, so if you want the challenge the creators intended, don't abuse this bug.