Also known as the Gem Box in older remakes, the Soul of Thamasa grants the wielder the ability of Dualcast.
The Soul of Thamasa, mistranslated as Samantha Soul, is a Guardian Force Ability item that teaches the "SumMag+40%" ability to any Guardian Force.
The Soul of Thamasa is an accessory that doubles MP consumption of the wielder for all spells, but strengthens the effects of said spells.
The Soul of Thamasa is an accessory that raises magic damage by 20%, collision damage by 10%, and Chase Bravery damage by 10%
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