Soul of Thamasa The Soul of Thamasa , also known as Gem Box and Samantha Soul , is a recurring accessory in the " Final Fantasy " series . It affects the character ' s ability to cast magic . Appearances . " Final Fantasy VI " . The relic Soul of Thamasa ( called Gem Box in the SNES translation ) grants the wielder the ability of Dualcast , but disables the use of summoning espers . Originally , it could only be acquired atop the Cultists ' Tower , but in the " Advance " and smartphone remakes , it can be stolen from Glutturn . Thamasa is a town founded by disgraced mages and populated by their descendants , and one of the only places left in the world where magic is still practiced ; the item ' s name alludes to the town . " Crisis Core - Final Fantasy VII - " . The Soul of Thamasa is an accessory that gives No MP Cost that allows Zack to cast spells without consuming MP . It can be found during Missions 9 - 4 - 4 and 9 - 6 - 5 . " Final Fantasy VIII " . The Soul of Thamasa , mistranslated as Samantha Soul , is a Guardian Force ability item that teaches the SumMag + 40 % ability to a Guardian Force . It can be stolen from Adel , refining Energy Crystal x50 into Samantha Soul x1 , Quistis ' s card into Samantha Soul x3 . Samantha Soul x20 can be refined into Elem - Atk x1 or Triple x60 . " Final Fantasy X " . Customizing a Bangle for Lulu with both Break HP Limit and Break MP Limit results in the bangle being renamed Samantha Soul . " Final Fantasy X - 2 " . The Soul of Thamasa is an accessory that doubles MP consumption of the wielder for all spells , but strengthens the effects of said spells . It can be bribe d from Detonator ( Oversoul ) and Volcano ( Oversoul ) , stolen from Volcano , dropped from Ixion , and as a reward for completing the in Zanarkand Dome ( Chapter 2 ) . " Final Fantasy XII " . The Soul of Thamasa is a loot stolen from Ishteen s , dropped by Oversouls , and is a reward from the Deathscythe Hunt . It is one of the loot items needed to buy High Arcana from the Bazaar . " Final Fantasy Type - 0 " . The Soul of Thamasa is an accessory that raises Magic Attack by 10 % and Intellect by + 5 points . It is acquired as treasure earlier in the game , and is later available at the item shops in Urbeth . " Bravely Default " . Soul of Thamasa is an accessory that increases the wearer ' s Intelligence by 20 . It can be found in the Vampire Castle . " Dissidia Final Fantasy " . The Soul of Thamasa is an accessory that raises magic damage by 20 % , Wall Rush Bravery damage by 10 % , and Chase Bravery damage by 10 % . It can be obtained by trading 2 , 000 gil , a Star Earring , a Rocket Engine , and Tomes of the Farplane x5 . In her EX Mode , Terra ' s " Chainspell " ability is described as " embracing the spirit of a magus " , referring to the Soul of Thamasa from " Final Fantasy VI " that gives the Dualcast skill . " Dissidia 012 Final Fantasy " . The Soul of Thamasa increases magic damage by 3 % , Wall Rush Bravery damage by 40 % , and Chase Bravery damage by 7 % . It can be traded for an Earring , Jet Engine , Tome of the Farplane , and 3 , 500 gil . Etymology . Soul of Thamasa is named after the town of Thamasa from " Final Fantasy VI " . On a few occasions was mislocalized as " Samantha " .