In truth, Uchiha Yato had not meant to torment Hiruzen Sarutobi. There were actually two reasons for what he had done.
First, the obvious reason involved Orochimaru. At the beginning, the Uchiha Clan had needed to evacuate all of Konoha, an extraordinarily difficult task that had progressed very slowly.
On top of that, Uchiha Yato knew Fugaku Uchiha's damn personality inside and out. He knew exactly what kind of man Fugaku was.
So, Uchiha Yato had deliberately arranged for Orochimaru to serve as backup and assist them.
After all, aside from the very few Uchiha clan members whose brains were simple to an extreme, the rest were fairly rational. They were all willing to follow Uchiha Yato and leave this garbage dump of a place.
As for the second reason, it was much simpler. In Uchiha Yato's world, Hiruzen Sarutobi had admitted defeat and surrendered far too quickly, leaving Uchiha Yato with no chance at all to have a "friendly spar" with him.
Now that he had found an opportunity, he naturally had to vent properly and let Uchiha Yato have some fun.
Happy times were always short. For Uchiha Yato, that joyful moment vanished in an instant.
For Hiruzen Sarutobi, meanwhile, that humiliating ordeal had finally ended. He immediately pulled back.
The first thing he did was not use Impure World Reincarnation, but clear out the non-Konoha people nearby.
This time, Hiruzen Sarutobi used Wood Release to attack the other ninja not because he wanted to cause casualties, but simply because he wanted to force them back.
Anyone with even a little sense knew they should retreat. Those without any had already been reduced to ash on the ground.
Uchiha Yato did not want to interrupt Hiruzen Sarutobi's personal show right now. After all, he was truly the center