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Equipment can be insetted with powerful jewels that can be either
bought at Grak in town or looted from corpses of monsters. The command
to place jewels into equipment is inset (jewel name) (item).
Jewel of Flame - Adds Strength
Jewel of Mountain - Adds Constitution
Jewel of Night - Adds Agility
Jewel of the Soul - Adds Wisdom
Jewel of Wind - Adds Intelligence
Jewel of Water - Adds Dexterity