Oboro had lied.
Although he could withstand Saitama's countless attacks within the soul domain, he still had to endure the "pain."
Simply put, Saitama's attacks were ineffective and dealt no damage... but the sensory impact inflicted upon his soul was still transmitted back to Oboro himself.
He still had to endure the crushing pressure of Saitama's countless attacks.
At this point, it was no longer the pain of countless deaths... Saitama's attacks were simply too destructive. Oboro's soul would be annihilated almost instantly, leaving him no time to experience the effects of "death." Yet because of the sheer strength of Oboro's physical attributes and will, before the bald man's attacks landed, he could clearly feel every trace of their terrifying might.
Countless omens of death shook his very soul.
Every impact upon his "mind" was beyond words.
Only he could endure it... anyone else would have collapsed long ago.
And once his will collapsed, his soul domain would dissipate.
Besides, Saitama was not incapable of killing him.
Generally speaking, only rules could contend with the power of rules... but under the particular setting and background of One-Punch Man, Saitama was unique. So long as the bald man's power rose to a certain extreme, he could likewise contend with rules.
If he could even shake rules, then a soul was nothing worth mentioning.
The soul was something mysterious. Though it was not a rule... defeating something mysterious did not actually require overwhelming power. The key was the method. As long as one found the right way to crack it, even if Saitama did not understand souls all that thoroughly, he could still kill Oboro.
But the problem was... Saitama truly was not good at thinking—at what was called "combat thinking." His battles had always ended with simple violence: one punch, one