No the machina force is not a god

The deus ex machina, or "god from a machine" is a hack literary trick where the problems of a plot are resolved at the end of the story by the sudden introduction of a new element.

The plural of machina is machinae.

The deus ex machina, or "god from a machine" is a hack literary trick where the problems of a plot are resolved at the end of the story by the sudden introduction of a new element.

Machine Soldier can special summon Machina Fortress, as it is a Machina monster. Machina Fortress has an inbuilt special summon method, but this is a 'you can' and not a 'can only' thing, it can be special summoned by other effects if you wish.

Since Machina Soldier is a machine, you are also allowed to use it to pay towards Machina Fortress's own special summon cost.