Suttngr’s Claw dagger
This weapon is found in Wincestre.
Simply make your way to the western part of the city near Saint Peter’s Church.
Here, you’ll find an opening that’s surrounded by statues and pillars. Go jump down.
Again, you’ll be moving some blocks and running around with explosive vases to create openings.
Later, you’ll discover the main room which has the Suttungr’s Claw dagger and the codex page.