Yaldabaoth was one of the most evil Gods in existence, and he had many titles.
He was often referred to as the Malevolent Demiurge, or "False Creator God".
Just like his title suggested, he was a powerful God that could create anything in existence, even a universe filled with living creatures.
In truth, the true Mastermind behind the Army of Destruction was none other than Yaldabaoth.
He was the God that decided which world was meant to be destroyed, but he didn't just randomly choose which worlds to destroy.
No. Even though he was evil, there was a certain law that he followed, and that was the lifespan of the world.
Just like how a mortal child would be born, grow, and die, the Malevolent Demiurge would only send his Army when the time was ripe. Naturally, those who lived on that world would do their best to resist their demise, which was only a natural thing to do.
No one wanted to die.