When this seemingly ordinary quarterstaff is examined
magically, it will have an aura of alteration.

Upon proper command, it
will shoot forth from its upper end a long and sharp spear blade which
makes the weapon into a spear rather than a staff. Upon a second
command, the length of the weapon will elongate to a full 12 feet, and
the third command will recall it to its original form of a regular staff.
The powers and value of each staff-spear are determined randomly
when the item is first employed:
 
 

Die  roll	To hit  & damage	X.P.  value	G.P.  sale value
1-6	+1	1,000	5,000
7-10	+2 ()	1,500	7,500
11-13	+3	2,000	10,000
14-16	+4	2,500	15,000
17-19	+5	3,000	20,000
20	+3*	3,500	25,000

* - does damage as ranseur (2-8), but still acts as spear if used to thrust or when set to receive a charge.