So the pope just wins easily, yeah? That's the only logical conclusion here, the crew were struggling against only 1 monster, and now he's summoned even more and they've all merged together to make a mega monster that's way more powerful than the first one, so he wins and the heroes die or are enslaved by the pope, right?
Oh, right, the heroes will have a mega power-up out of nowhere in the next chapter that will let them easily beat the pope. This is a terrible writing choice and a terrible trope and it can only result in something terrible. Japan, get better writers.