World War Z: Aftermath Weekly Challenge #2 ( Golden Bull )

WWZ: Aftermath Weekly Challenge (Hard Mode)
Public Coop
Class: Fixer
Map: Moscow - Battle of Nerves
Challenge:
Nemesis - You will be chased throughout the entire mission by a Bull that can't be killed.
Asthma - You will lose your health (3% per second) when sprinting.
Light Waves - Zombie waves will be twice shorter.
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