Realius didn't know who was the one who created the spatial rift near Planet MA nor did he plan to know. As long as that existence isn't a Transcendent Realm Manipulator, then Realius can defeat him, her, or it.
If it wasn't for the fact that the founder of Manipulator's Academy is Realius' friend, Realius will not even bother in agreeing to the request of the Headmaster of the Manipulator's Academy.
Realius isn't some naive hero brimming with ideals so even if the [Eater Of Worlds] tries to eat a world, Realius will only turn a blind eye towards the [Eater Of Worlds]' actions.
After all, it is normal for a world or two to be eaten by an [Eater Of Worlds] and even those Semi-Supreme Beings saw an [Eater Of Worlds] eating a planet, only 1% percent of them will save the planet from being eaten by the [Eater Of Worlds].
Not all living beings are heroes. Heroes are mostly those living beings who believe in their distorted sense of justice yet lack the power to save someone so they use their mouth instead. All talk but no actions.
Most heroes are living beings who have not experienced the dark side of the world so they forcefully save someone in the name of justice. In other words, heroes are just some naive existences that need to be taught about how the world works.
There are also some instances that a hero becomes drunk or corrupted with power after obtaining a power that is powerful enough to either rule or destroy the world.
That is why the Manipulator's Academy exists. Those heroes who have saved their world are recorded in the Manipulator's Academy's database in live time to prevent a hero from being led astray.
After all, not everyone is interested in witnessing the cliche which is the hero becoming a demon king after slaying the demon king.
There are also some occurrences when the hero is branded as a demon king after defeating the demon king due to the hero possessing the threat to destroy the world.
Anyways, none of the lives of the living beings from another world or another universe concerns Realius as long as those lives aren't involved with reality.
Realius regulates the laws of reality so if those living beings tamper with reality or threaten reality then Realius won't stand in ceremony and he will do whatever it takes to wipe out that living being from existence.
Realius is now using his "Eyes Of Reality" to check if the spatial rift is caused by a violator of the laws of reality or if the spatial rift violates the laws of reality.
If it is the former, then Realius will do whatever it takes to find the violator. If it is the latter, then Realius will only use his abilities to remove the spatial rift.
The [Eater Of Worlds] is none of Realius' concerns unless that [Eater Of Worlds] had violated the laws of reality or tried to eat Planet MA.
"If it doesn't concern reality, then it doesn't concern me." would be the motto of Realius Regulus if someone has asked him about it.
If someone asked Realius what his alignment is, then without any hesitation, he will answer that his alignment is True Neutrality.
After all, he only does things that concern him and reality and nothing else.
Even if Realius witness a Semi-Supreme Being with an alignment of Lawful Evil, Neutral Evil, or Chaotic Evil, he wouldn't bat an eye towards their actions even if those Semi-Supreme Beings destroyed a universe.
After all, it was everyday life for a Semi-Supreme Being to see the rise and fall of a world and universe due to their long life. Only Semi-Supreme Beings that are at Transcendent Realm can possess an infinite lifespan since they have already transcended life and death.
Anyways, after inspecting the [Eater Of Worlds] using Realius' Eyes Of Reality, Realius' eyes become cold as he gazed at the [Eater Of Worlds] with an intent to kill.