Talisman of the Sphere: This is a small adamantite loop and handle which
will be useless in any but a magic-user’s possession, and any other class
touching a tolismon of this sort will take 5-30 hit points of damage. When
held by a magic-user concentrating on control of a sphere of annihilation,
a talisman of the sphere doubles the intelligence bonus percentage for
control, i.e. 2% per point of intelligence from 13-15, 6% per point of intelligence
from 16-18. If control is established by the wielder of a talisman, he
or she need check for continual control only every other round thereafter.
If control is not established, the sphere will move towards the magic-user
at maximum speed (16‘/round). Note that a wand of negation will have
no effect upon a sphere of annihilation, but if the wand is directed at the
talisman it will negate its power cd control so long os the wand is so
directed.