God of War Custom Items

Adds the following content to the already existing ones:

Mimir, Smartest Man Alive: Completely replaces the Totem of Undying with Mimir's Head from God of War. He speaks once the totem is used.

Replaces the following content:

Leviathan Axe (128x): Replaced by the 512x version of the Leviathan Axe. Mjolnir (128x): Replaced by the 512x version of the Mjolnir.

The new models are much more performance-friendly, detailed and animated.