Revelations Apothicon Mask

Setup - Activate Pack-a-punch

Kills - Go into the big apothican beast. Every three minutes its stomach will rumble and release a green mist. Get all these kills in the stomach while the mist is active. The kills needed are 50 zombies, 10 furies, 5 keepers, 5 parasites, 5 spiders, and 3 margwas. you should hear and audio queue when you kill a certain type of zombies and another queue when you get all the kills.

Mask - Go to the stage in Kino Der Toten and it should be on a stand. It benefits by +1 hit from all enemies, sprint duration increased, player does 50% more damage against all enemies, 33% damage reduction from all enemies