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The war of epic proportions just began, as the enormous quantities of plant monsters continued to grow bigger and bigger, spreading across the entirety of the world constantly and without even waiting for a single second, they continued to grow bigger in numbers until they started to ultimately attempt to take over everything, but the Undead emerged by the grace of Hades and Frank! Frank wouldn't had been able to summons o many Undead by himself, however, as his mind power has a limit even as a god, but thanks to Hades, this limit was able to be broken and Hades conjured more and more Undead, summoning an army of new and powerful unliving soldiers.
Check "The Protagnist's Sister Is Actually the Strongest"!