3 0 0Actions Report Solution This is story related. You can unlock this near the end of the game. If you're doing a lot of side missions before tackling sin (and you should. You really should especially if you're trophy hunting) he won't even be a challenge. If you haven't he still probably won't be too challenging though his boss fight has some odd elemental shifts, the player can just pummel him into the ground if desired.
0 0 0Actions Report Solution also , to add on, if you have fireproof, blizzard proof, tide proof and lightening proof, makes fight so much easier. he does heavy element damage and this helps keep people alive.