Robe of vines
|A robe woven of living vines. The vines form a symbiotic relationship with their wearer, greatly increasing their regeneration, but preventing them from being healed by potions.|
Prevents healing from potions while worn
The robe of Vines increases its wearer's regeneration rate by 7, providing an incredible bonus of 2.8 HP per turn. This artefact can be extremely useful for recovering HP quickly. Note that, unlike the amulet of regeneration, which only kicks in after the wearer has attained full health (once), the healing effect of this garment is immediate upon being equipped.
While the robe can provide survivability during battle, a robe with an ego like resistance or Archmagi may be better for general use depending on your character. Alternatively, a set of heavier armour and a solid array of resistances can reduce incoming damage enough to make your base regeneration rate perfectly acceptable, though even then the robe can still be useful to carry around for a quick heal.
Deep dwarves and bloodless vampires do not regenerate and gain no benefit whatsoever from wearing the robe of Vines, whereas ghouls can only benefit from the robe if there are no monsters in sight. Vine stalkers, mummies, and lichform, on the other hand, can freely wear this item with no drawbacks. This item is particularly interesting for undead; since they cannot quaff potions at all to begin with, the robe's limitation on potions is not a concern.