MHF2 - Best Weapon for Killing Tigrex? (Devil Slicer or Khezu Shock Sword)

I'm pretty good with both longsword and greatsword, but which would be better for beating a tigrex?

I'm pretty good with both longsword and greatsword, but which would be better for beating a tigrex?

GameFailed

Thanks, got it and beat him. Piece of cake... (kinda) :P