What do false gods have to do with pvp? Do you mean For Glory like in Sm4sh?
I think he just wants to see FGs fight each other, and be able to observe the process same way we can observe PvP matches through spectator function. Basically, an EvE spectator.
To which we say: there's the
EtG match simulator, but it's a bit outdated, seeing how it doesn't have Salvagers. That couple with the fact that it doesn't actually show how the match goes, describing it on words instead, makes it only useful for testing AI-friendly decks for the Arena. That said, because of the fact that it's very rudimentary in its... well, everything, it save a lot of time. Like,
a lot of time: you can run 100 matches between two decks in a click of a mouse.