Bzaan

From LSWiki

 (  )    [ = Bzaan = ]
  ||       [ Type                    : ] utility
  ||       [ Description             : ] pain suppression
------     [ Significance            : ] minor
------     [ Activity Cost           : ] fifteen
  ||       [ Activation Spirit Cost  : ] five
  ||       [ Maintenance Spirit Cost : ] one every thirty seconds
 (  )      [ Control Skills          : ] eight parts pain tolerance, four
             parts power tuning, three parts power direction, three parts
             power generation and two parts power focusing
           [ Specialty Access        : ] pain tolerance degree II access
           [ Possessed               : ] no

The rune bzaan, while activated, makes you completely insensitive to pain. While this keeps pain from interfering with your ability to function, it also keeps pain from serving its purpose, which is making you aware of injury; evaluating the state of your health becomes a matter of some difficulty without it, relying mostly on visual inspection.