Lufia: The Ruins of Lore Cheats

Sacrifice kills the enemy and the user. However, there is a glitch. If you use Sacrifice on yourself, you heal 999 HP

Go to the blacksmith in Gruberik. Make sure you have the ingredients for a Nectar (and found the alchemist). Make a Nectar. The blacksmith will make the item like normal, but you won't lose the ingredients! You can get infinite Nectars at no cost.