A healthstone (SLASH'EM) is a gray stone that modifies a player's heal rate. Blessed or noncursed healthstones increase it, cursed healthstones decrease it. Unfortunately healthstones are always generated cursed. Unlike luckstones, healthstones are cumulative - two blessed healthstones are better than one. To be precise, you have a health bonus which is 2 for each blessed healthstone in you main inventory, plus 1 for each uncursed healthstone, minus 2 for each cursed healthstone. This bonus is added to your level and constitution when calculating how fast you heal.

After a spoiler by Eva Myers.

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