This thread shall summarize everything we know about WZIB, as I think there are multiple posts already, but no real comprehensive knowledge base.

Basics

WZIB stands for Warzone Idle Battle. Its self-description is:



Prerequisites

* Reach phase 2 in Idle
* Unlock the auto-conquer advancement
* Join wzib every half an hour at :00 and :30
* Find at least 9 other players to join


Reachability

Either via the crossing swords symbol which appears in the top right corner of any idle map when a battle is up, or via the back button from any WZI map which brings you to this menu:




Rewards

Check out those posts:
* https://www.warzone.com/Forum/636838-wartog-vs-wzib
* https://www.warzone.com/Forum/499435-wzib-battle-points-rewards

TL;DR. WZIB is cancer.

Thanks otto