Arthas' Ancient Ritual of Soul Binding and Transference

Upon casting, the caster spends 10 minutes channeling the target's soul into the pearl. The ritual rips the bond between the soul and the body, and confines the soul within the gem. The soul can be released into a thrall controlled by the caster, and depending on a percentile roll, how much of the personality transfers to the thrall. 

• Above 95 is a full transfer of personality, still holding any prior grudges.
• 94 to 51 is partial transference, personality transfers without knowledge of prior life.
• 50-6, forgets special abilities and only attributes transfer (all attributes, including INT,WIS, and CHA)
• 5 to 1, only STR, DEX, and CON transfer to thrall.

The thrall serves the caster until destroyed.