Teleportitis
Teleportitis is the common name for the teleportation intrinsic/extrinsic that allows you (or forces you, depending on your viewpoint) to teleport randomly every few turns. It may be gained by eating a leprechaun, nymph, tengu, or Wizard of Yendor corpse, or by wearing a ring of teleportation (these are often cursed, so be careful).
Teleportitis is infinitely more useful with teleport control, from a ring or an intrinsic. "Controlled" or "uncontrolled" teleportitis refers to whether a character has teleport control along with his teleportitis.
Teleporting at will
If you have teleportitis and you have reached experience level 12 (or level 8 for a Wizard) then you can use [^T] (Control-T) to teleport at will. This costs nutrition and energy like a spell. If you cannot teleport at will, then [^T] will attempt to use your teleport away spell or the local teleport trap instead. (Source code: teleport.c#dotele)
Shopping with uncontrolled teleportitis
If you need to visit a shop when you have uncontrolled teleportitis, you should use the following procedure to avoid accidentally stealing items:
- Stand on the item you want to buy and use the #chat command; the shopkeeper will tell you the price (eg, "a food ration, price 60 zorkmids.")
- Drop that much gold to the shopkeeper by using a numerical amount with the drop command (eg, "d60$"). The shopkeeper will recognize it and establish a line of credit for you (eg, "You drop 60 gold pieces. 60 zorkmids are added to your credit.")
- Try not to throw gold at shopkeepers. There's a chance that the shopkeeper will get angry at you.
- Pick up the object. If you are randomly teleported out of the shop (or leave it in any other way) at this point, your credit will be used to pay for the item without angering the shopkeeper (eg, "Your credit of 60 zorkmids is used to cover your shopping bill.")
- Alternatively, just use the pay command as usual, and the shopkeeper will use up your credit before asking you for any more gold (eg, "The price is deducted from your credit.")
