Ring of polymorph

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Name polymorph
Appearance random
Base price 300 zm
Weight 3
Probability out of rings 3.57%
Probability out of items in:
containers Rogue level Gehennom Elsewhere
0.179% 0.179% 0.286% 0.107%

Wearing a ring of polymorph gives you polymorphitis, which has a 1% chance of polymorphing you each turn. This ring is usually generated cursed, because uncontrolled polymorphitis is really a pain. It can also cause system shock (unless you have control or are wearing dragon scales or dragon scale mail).

If you have polymorph control, you may choose the form into which you polymorph. If you are inflicted with lycanthropy, the ring of polymorph will occasionally trigger a change into your normal form or the animal form of the werecreature that infected you.

If you are wearing an amulet of unchanging, the ring of polymorph will have no effect (besides the usual ring hunger).

Dropping the ring into a sink will polymorph the sink into one of altar, fountain, grave or throne. This is a 3.6.0 addition integrated from UnNetHack.


If you find a ring and test its price and BUC status, the chance of a ring of polymorph is given in the following table. You can rule out teleport control by walking on a teleportation trap and conflict by wearing it in sight of monsters.

Testing done Any BUC Non-cursed Uncursed Cursed Blessed
Any price 3.45% 0.50% 0.52% 10.14% 0%
300 zm 25.0% 3.6% 3.6% 75.0% --
300 zm, not telecontrol nor conflict 50.0% 10.0% 10.0% 90.0% --
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