Upgrade StepsGet the Lil Arnies. Only available from the Mystery Box, spin it until you win!The next step is to get 150 kills with the Arnies. Your inventory will refill every round, so this should take no time, especially at higher rounds as more zombies will spawn in.Throw three Arnies into the window of the church tower in spawn. Samantha will laugh with each successful throw. Once all three have been thrown in, your inventory will replenish and the Arnies will upgrade for all players in the game. The upgraded Lil Arnies will now appear purple and will have more health be able to get more kills in.