
A leviathan soul.
Leviathan souls are valuable items in Tools of Destruction. They are the souls shared by dangerous creatures of the larger variety,[1] including the basilisk leviathans in Cobalia and the Nundac Asteroid Ring, and the grunthors on Sargasso. Ratchet and Clank collected them for the Smuggler in exchange for bolts.
The Smuggler killed and collected Leviathan Souls himself,[1] but first offered to pay for any that Ratchet collected himself on Cobalia in "Hunt for Leviathan Souls". Space pirates from Ardolis then approached the Smuggler to buy souls from him, leading him to the Nundac Asteroid Ring; when Ratchet arrived, he instead offered to pay Ratchet to do in exchange for access codes to the Apogee Space Station, commencing "Make a Trade with the Smuggler". The parrot then said Ratchet had a "deathwish" for doing so, suggesting they were both scared by the idea.[2] Finally, on Sargasso, when the Robo-Wings launch pad was not functional, the Smuggler offered to give Ratchet a Decryptor to reactivate it, in exchange for more souls, commencing "Trade Souls for the Decryptor".[3]
On both Nundac and Sargasso they were offered additional optional missions to hunt for more souls in respectively "Sell Your Souls" and "Soul Searching". The player can sell Leviathan Souls to the Smuggler on any planet he is on. It is best however to save them for Sargasso, as the value for each soul increases by this point from 2,000 to 8,000 bolts. The max total of souls is 27, although you need to trade seven to meet mission requirements. Selling the other twenty also grants you the "Bolts in the Bank" skill point.