USE-TRIGGER

USE:
  Triggered when the actor attempts to use the "use" command onto the owner object.
  Phrase is chance to activate (100 is always).
  Various types of objects can be used and they are checked in following order and
  location:
  1) held item
  2) worn item
  3) item in room
  4) item in inventory

  "Use" command in universal to all objects (wands, staves, and morp objects) and
  both spells (wands/staves) and morp is activated on use.
Example:
add 300 use 100