how to play attrition halo infinite

Cyber showdown launched last Tuesday with a new game mode called attrition
for halo infinite.
Attrition is essentially a battle royal mode in halo infinite -something 343 Said they would never introduce- with this each team has a limited number of respawns and is eliminated once the team is out of lives. Additionally, there is a decreasing barrier called 'the Danger zone' which forces all players to the middle of the map!