Besides, this place could never return to its former state now.
Oh, right. The Evil Energy here was essentially a collection of negative energy from across the Shinobi World.
The legacy left here would passively absorb negative energy from all over the Shinobi World.
It would then undergo a series of collection, compression, and purification processes.
After every other impurity was expelled.
Only the purest dark energy remained.
This pure dark energy and the legacy were Seiichi's "great opportunity"!
The people of the Land of Demons had developed their unusual constitutions by unconsciously absorbing those impurities.
As for the legacy, that was easy enough to guess. It was the extra spiral tattoo over Seiichi's right shoulder blade!
The original spiral tattoo was the legacy of this place.
Only by absorbing all the energy here could someone gain the legacy's recognition.
Otherwise, they would merely gain a little benefit from the energy.
As long as the legacy remained, this place would sooner or later return to its original state.
But now that Seiichi had taken the legacy away, this was just an ordinary space.
Demonic Beasts like Moryo would never appear here again.
The Land of Demons' problem had been solved for good.
Seiichi no longer needed to stay in one fixed location, either. He was a mobile, humanoid collector of negative energy.
All the negative energy in the Shinobi World could fuel the growth of his strength.
He ran a few simple tests.
He familiarized himself with his new abilities.
Then it was time to leave!
Seiichi stretched from side to side, his bones giving off a series of cracks and pops.
He raised his left hand and condensed a black energy sphere the size of a tennis ball, with a standard diameter of 6.7 centimeters.
He picked a random