Oak Den drops (Mimic)

On level 23, Tormod asks you to go inside the Oak Den. Reaching it, and after a fight, you can choose three item categories and 2 or 3 items per category. The items are listed here.

Weapons
Eternal Lantern

Claws of the Forgotten Shaman

Dagger of Thousand Storms

Armors
Monster Kicker

Deer Hunter Grips

Breast Plate of the Conqueror

Spells
The damage and mana cost of the spells in the picture is for level 23.

Shield Disruption

Steal Shield