Prologue: Judgement delivered

Zamasu deeply inhaled as he had just escaped imprisonment at the hands of Trunks and his allies. Goku Black, his close ally and alternate self, appeared by his side and looked at him. "Look at yourself." He scolded. "Just what happened to you? Zamasu turned to Black rather flustered.

"It seems we've been making a terrible error in judgement. If we aren't careful, the mortals could erase our ideal future in an instant." Zamasu warned. Goku, Vegeta, and their friends only stood still as the 2 maniacs spoke. Black smirked and gestured to the green earring he was wearing on his right.

"I suppose it's time to show them our true power." Zamasu knew what his friend was suggesting with the small jewel and pondered the situation a bit. He knew the Potara were powerful items indeed. But he remembered how he was immortal and Black was not. Not only that, but the saiyans in front of them were both strong and clever. He feared they would still defeat them somehow against all the odds in his favor.

"No." He replied plainly. "Fusion would give us immense power, yes. But I prefer not to take any more risks with these scum." He insisted. Everyone gave Zamasu a weird look as a grin formed on his face. "Black, I order you to escape from this planet immediately. Suppress your power so you won't be followed." The kai looked down at their enemies and shot an icy glare. "I will finish this little skirmish once and for all by myself." He insisted.

Black was confused at first but being the same person gave him a sense for what his counterpart had planned. "Very well. I suppose you'll be fine with your immortality." With that small statement, he put his hand up to his forehead and in a flash he disappeared. Leaving only Zamasu to face the heroes. Vegeta was appalled by the change in tactics.

"That coward just left in the middle of this fight?" He yelled in anger. "Just what are you planning?" Zamasu laughed at the prince's question as he raised his hand into the air. A purple ball of energy started to form and grow.

"You mortals may consider this a victory. You fought so hard to protect it from true justice and you refuse to give up." As the kai monologued, the energy ball grew larger and larger. "So if you want this planet so badly then you can have it. And take it with you to HELL!" Zamasu let out a vicious scream and threw the ball down towards the ground. The Earth shook and rumbled as everyone toppled over from a loss of balance. The planet cracked apart like an egg shell and fire rose from the ground.

Then there was nothing. Earth exploded in a giant fiery inferno with no trace of life left apart from Zamasu floating in space. Black reappeared and caught his ally's body. "Destroying the Earth? Not a bad last resort." He congratulated. Zamasu's eyes opened and he chuckled.

"The loss of the land was a bit wasteful, but worth it to be rid of those disgusting creatures." He regained his balance and floated upright as he dusted himself off. "We can always resume the Zero Mortal Plan on another world." He suggested.

And indeed they would, their chaos would reign for years without anyone to stop them as they eradicated several civilizations without mercy.

Then one day, everything started to change.