A Dance with Rogues
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The following contains information on a character, area, item, or quest that is no longer present in the latest version of Part Two as of v1.20.

The soul stone was a unique item in Part Two version 1.14 and earlier. It, and the stone's owner, are no longer part of the game. The stone could be found on the third level of the Tower in the Planes.

Spoiler: The stone was the target of a theft orchestrated by the old man, in exchange for the safe return of the Princess' lost family members.
Note: The soulstone003 item is only used as a blueprint for v1.10 and later. The description is the same, but the name was changed from Jahara's Soul Stone.