Go to Alhafra. After using Burst on the rock pinning the mast of the boat, save and return to the Last Sanctum. A few glitches will occur with the game. The lady in the herb shop and several town people will tell you that the bridge is repaired when it is not. Also, you will not be able to proceed in the game because you cannot get the trident forged.
Submitted by: CobraGT