Cube of Force: This device can be made of ivory, bone, or any hard mineral. It is about the size of a large die—perhaps 3/4 of an inch across—and enables its possessor to put up a wall of force 10 feet per side around his person. This cubic screen is impervious to the attack forms shown on the table below. The cube has 36 charges, and this energy is restored each day. The holder presses one face of the cube to activate or deactivate the field:

	Charge Cost Per Turn/
Cube Face	Movement Rate	Effect
1	1/1	keeps out gases, wind, etc.
2	2/8	keeps out nonliving matter
3	3/6	keeps out living matter
4	4/4	keeps out magic
5	6/3	keeps out all things
6	0/normal	deactivates

When the force screen is up, the following attacks cost extra charges from the cube in order to maintain the integrity of the screen. Note that these spells cannot be cast either into or out of the cube:

Attack Form	Extra Charges
Catapult-like missiles	1
Very hot normal fires	2
Horn of blasting	6
Delayed blast fireball	3
Disintegrate	6
Fireball	3
Fire storm	3
Flame strike	3
Lightning bolt	4
Meteor swarm	8
Passwall	3
Phase door	5
Prismatic spray	7
Wall of fire	2

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