"Screw you! Compass Carburettor!" The Lucky Bastard System raged helplessly as Compass Carburettor had forced its hand to deal with his opponent.
It was clearly aware of what his scheme was. It was to transfer half of the memory fragments of the two Systems Hosts with one another.
As the two Systems had influenced the entire mind of their respective Hosts, the memories were their weapons, and pretty much part of their body by this point. That was how they controlled their respective Hosts.
But, transferring half their bodies would mean that the two Systems would have to fight against one another to gain dominance over the respective Host's mind.
It was because two Systems could never co-exist in one body. Doing so would result in their forms fusing, creating a brand-new existence that was neither System. A new System would be born in their place by deleting their identities.