Apothican Servant Upgrade

Box - You need to spin the mystery box until you get the Apothican Servant (Estulla Astoth)

Crystals - You will to shoot 5 small blue floating crystals in certain locations.

Crystal 1 - The first is in Der Eisendrache above the corruption generator.

Crystal 2 - The second is above Mob of the Dead's corruption generator.

Crystal 3 - The third is above Verruckt corruption generator.

Crystal 4 - The fourth is above the outside of Nacht Der Untoten.

Crystal 5 - The final is above the top jumpad at Verruckt.

Upgrade - once you have all 5 crystals, go to pack-a-punch and you should be able to pack-a-punch the Apothican Servant.