"I'd better recall the information about Enmu's Blood Demon Art ability." El said seriously.
In the Kimetsu no Yaiba anime, Enmu's Blood Demon Art can also be called Sleep Induction. The essence of this ability is to force anyone into a deep sleep.
Enmu can do this through various means, some more subtle than others, but all of them effectively render her enemies vulnerable and unable to fight.
The sleep-induced effects of her Blood Demon Arts are very strong and it takes considerable effort to wake the victim.
In the anime, such as the example when Nezuko headbutts Tanjiro quite hard but fails to wake him up.
However, the Sleep induction condition was not perfect, as Enmu cautiously preferred to stay away from Demon Slayers for fear that her bloodlust might wake them up, although she was far less cautious towards normal human targets.
But, among the most dangerous things about Enmu's Blood Demon Arts was the ability to enter, manipulate and control one's dreams while the victim was asleep.
While using her Blood Demon Arts, Enmu's victims experience the sweet dreams that everyone normally experiences, capitalizing on their weaknesses and ensuring they are unable to distinguish between reality, thus quickly seducing them into accepting the utopian visions that lie before them.
This level of vulnerability makes it easier for Enmu to manipulate her prey, bribing people to do her bidding by giving them sweet dreams, which also double as a means to perpetuate her own sadistic practices.
Just as Enmu can grant dreams, she is also capable of imposing nightmares, which she uses as both a psychological attack and a means of torture, something she particularly enjoys when preying on humans.
However, just like the ability of her Blood Demon Arts to put people to sleep, Enmu's dream induction, while powerful, is not perfect.
One can resist its effects through sufficient willpower, which allows the affected person to realize that they are actually living an illusion.
However, realizing that they are dreaming is not enough to end the induced sleep.
Tanjiro was only able to force himself out of Enmu's sleep induction by killing himself within his dreams, something he was forced to do repeatedly during his battle with Enmu, doing so instantly whenever he was forced to fall asleep.
"If I'm not mistaken, this dream realm has something called the subconscious. These two realms are connected." Once again, El dredged up his memories.
The memories of the Kimetsu no Yaiba World once again came flooding back. Because the dream world was based on his memories.
This dream dimension was not infinite, but circular with the dreamer at the center and a solid wall at the edges. The wall is completely indistinguishable from the more distant terrain beyond it.
By punching a hole through this dividing wall, one can leave the dream realm and enter the dreamer's subconscious.
The subconscious always reflects the character of the individual, Tanjiro's subconscious for example is a beautiful endless sky, known as a sense of security and warmth.
In the subconscious, there is an entity known as the "Spiritual Core." If the core is destroyed, it will effectively destroy the target's mind, leaving their body as an empty shell, thus allowing Enmu to kill its victims in their dreams.
However, it should be noted that there is a danger of being affected and possibly mentally altered by the subconscious mind of its victim.
For example, when one of Enmu's chess pieces was touched by Tanjiro's kindness and subsequently lost his desire to destroy his spiritual core.
For this reason, Enmu always asked others to enter the target's dream instead of entering it herself.
After reviewing the memories, El immediately ran quickly through the dreamland in a straight line with a worried expression.
"This is serious, Enmu isn't that stupid! Just in case, I'm sure Enmu must have eliminated all the sharp objects for me to commit suicide!"
"Forced, I have to find the boundary wall of the dream realm and beat up that intruder. I'm not sure I can find the boundary wall of the dream realm."
"But, there's no harm in trying right?"
As he ran, El looked at his familiar surroundings. Modern minimalist design houses with walls made of bricks, and tiled roofs.
"Apparently, I haven't been burned by Nezuko's Blood Demon Art, as a result I'm still in my past appearance." said El who continued to run through the streets.
Until finally, El came to a halt as he hit an invisible wall, which made his fall down in front of it.
Holding the sore forehead area with his right hand, El stood up and groped for something invisible in front of him.
"Ugh, why was my past self so weak?" El grimaced as his forehead ached.
"Ah!" El suddenly came to his senses and broke out in a cold sweat. "How do I tear down the wall of the subconscious? Where are the intruders anyway? Why is it so quiet!"
As if responding to El's wish, the wall separating the subconscious from the dream world was cut, opening a gap of space by itself.
"This... How can this be?" For a moment, El was shocked by what had just happened.
El stood still like a statue, watching the space in front of his split open. Before long, El regained his consciousness. "Ugh, I'm almost lost in thought again!"
El let out a very long sigh. Immediately, El solidified his footsteps and entered the gap in the room.
As soon as she entered it, El was surprised and had a very confused expression, because right in front of her was a field of red flowers blooming.
There were no beautiful flowers like roses, lavender and tulips, but blood-red Higanbana flowers.
Looking up at the sky, El saw a dark sky with no stars. However, there was only an icy blue moon, making anyone who looked at it shudder in fear.
"My subconscious is a bit unique, isn't it?" Without hesitation, El began to walk among the blooming Higanbana flowers.
With each footstep on the ground of the Higanbana flowers, El left a blood footprint.
The blood footprints began to spread rapidly, changing the terrain she walked on, like smoke from an extinguished candle flame.
"What's going on?" said El, who was very confused about her surroundings.
From there, the circle of ripples spread in all directions very quickly. In just one second, the vast Higanbana field turned into an ocean.
Even the icy blue moon had been replaced with a blood-red moon, illuminating the world with rage.
The ocean where El was at this time was different from other oceans that had bluish-colored water. The entire water of this ocean was very red like fresh blood that had just dripped. This ocean was so calm, without wind and waves.
El stood on the surface of the sea of blood. As far as the eye could see, El saw nothing but the same scene.
Out of curiosity, he stepped out and created another water ripple in the sea of blood.
Suddenly, the surface of the water inside the ripples turned into a giant water mirror.
"This!" El immediately came to her senses and was shocked by what she saw.
In the giant water mirror beneath his feet, there was a visualization like a video recording that kept replaying very quickly.
Visualizations of life and death filled his vision, showing various kinds of life being born, and death ending.
El could see very clearly the visualization of the murder he had committed and killed the infected while in the Last Human world.
Not only that, El could even witness the visualization of the life and death of insects, small animals, and objects.
El's heartbeat was racing, an uncontrollable overwhelming sensation infiltrated her. His face paled even more, his breath coming in short gasps as if trapped in an endless cycle of nightmares.