Above the valley.

Inky black magic spread out in all directions with Keaton as the center.

In order to release this spell, Keaton had chanted for more than 30 seconds as preparation.

This spell was the strongest spell that Keatonan had mastered. It was called the Realm of Darkness.

Unlike the previous Caged Trap. the Realm of Darkness was a mass buffing spell.

For ordinary Necromancers, the Realm of Darkness was a type of spell that relied heavily on one's accumulation.

Although Necromancers could summon dark creatures, they were not specialized in summoning such magical creatures. Thus, they would only have a limited number of them.

However, the Realm of Darkness required the caster to have at least 10 summoned dark creatures to unleash its full potential.

Boom!

After a loud bang, darkness covered the entire valley.

It was as though all the sunlight in the valley was dispersed by the spell.

Immediately after, the Abyss Snake charged into the valley with eight skeleton soldiers and four Ghouls on its back.

As soon as they entered the valley, the Abyss Snake unleashed its passive skill, the Might of the Abyss Overlord.

Keaton's Ghouls and Skeleton Soldiers received the enhancement of this passive skill, and their attributes all increased by 10%.

However, this was not the end.

On top of the valley, standing beside Keaton, the Centaur Lady began to chant another incantation.

Beams of red light descended from the sky, enveloping the ghouls.

Under the enhancement of the Berserk spell, the bodies of the four ghouls instantly swelled up to 4.8m tall.

At the same time, the movement speed of the ghouls rose again, and they charged, appearing in front of the demons in a flash.

"Hold back on your mana for now. Once the Abyss Snake and the Demon Lord start fighting, you can release your Berserk spell on the Abyss Snake."

Above the valley, Keaton looked on coldly at the demons in the valley.

"Yes, Master."

The Centaur Lady was still as gentle and pleasant as before. No matter what orders Keaton gave her, she would obey and never resist.

With the large size of the Abyss Snake, countless Rank 1 and 2 demons were crushed into a pile of livestock by its huge body as soon as it charged into the lair.

Seeing its minions being killed by the Abyss Snake, the Demon Lord roared and charged towards the Abyss Snake with a bone blade.

Boom!

The two massive bodies crashed into each other, kicking up a cloud of dust.

Countless demons died on the spot as part of the collateral damage.

Ding! Ding! Ding! The system notifications repeated sounded in Kedan's ears, but he was not in the mood to check the number of soul fragments he had accumulated.

All his attention was on the Abyss Snake.

The moment the Abyss Snake showed any signs of defeat, he would command the Centaur Lady next to him to release buff the Abyss Snake.

At the same time, Keaton also readied another Necromancer spell.

Unlike the Realm of Darkness, this necromantic magic was not an AOE buff but a single-target damage spell.

This spell was called the Spear of Darkness. It could ignore the defense of the target and directly pierce through their soul.

Furthermore, this spell could be enhanced by his Realm of Darkness.

Strictly speaking, the level 4 Demon Lord had stronger combat capabilities than the Abyss Snake.

However, with the support of the Realm of Darkness, the Abyss Snake was already able to fight the Demon Lord to a draw.

After being unable to defeat the Abyss snake after so long, the Demon Lord felt extremely humiliated.

It was after all the strongest existence within a radius of a few hundred meters. Now, another person dared to challenge its authority. How could it not be furious?

The Demon Lord raised his bone blade high above his head.

The next moment, black flames appeared on the bone blade. Keaton immediately recognized that these were the demonic ghost flames recorded in their textbooks.

"Berserk Spell!"

Keaton roared, ordering the deer girl to unleash her magic.

This Demonic Ghost Fire was an innate ability that only Rank 5 Demons could master, and the fact that this Rank 4 Demon Lord had mastered this ability ahead of time meant that he was about to advance to Rank 5.

As he looked at the burning flames on the bone blade of the Demon Lord, a burst of fury erupted in Keaton's heart.

At this moment, he already understood that the Demon Lord was only teasing them previously and did not use his full strength.

As soon as he thought of this, the Demon Lord at the bottom of the valley seemed to have noticed it. It grinned as he looked towards Keaton.

From the look on its face, he was trying to tell Keaton: "I am about to kill your pet!"

Keaton flew into a rage. The necromantic magic energy in his hands gathered rapidly, and a spear materialized in his hand.

Keaton took a step back. Strength surged up his back leg, passing along his spine to his arm.

Peng!

In the next moment, the Spear of Darkness flew towards the Demon Lord, bringing with it a strong gale.

The Demon Lord grinned and raised its bone blade to shatter the incoming Spear of Darkness.

However, right at this time, that spear turned into an illusory figure, phasing past the bone blade.

After dodging the bone blade's slash, the Spear of Darkness recondensed into a physical body and stabbed viciously into the Demon Lord's chest.

"Abyss Snake! Release the Black Snake Frenzy!"

Keaton's order sounded in the Abyss Snake's mind. The eyes of the Abyss Snake suddenly turned red, and a violent power surged from its body.

Hiss!

A mouthful of viscous poison was spat out from the Abyss Snake's mouth, ruthlessly hitting the Demon Lord's chest at the very wound caused by the Spear of Darkness.

This was the third skill of the Abyss Snake, and also its trump card.

After receiving this mouthful of poison, the pale face of the Demon Lord was instantly dyed with an unerasable black color.

"Take his life while he's sick. Centaur Lady, cast your curse spell."

Keaton gave the second order, and the the Centaur Lady's curse spell was activated. A black light silently entered the body of the Demon Lord.

With the curse taking effect, the Demon Lord's movements instantly slowed down. In addition to the poison used by the Abyss Snake, its movements were now slow beyond belief.

"Abyss Snake, shatter it!"

With those words, the Abyss Snake raised its thick tail, and like a steel whip, it ruthlessly struck the head of the Demon Lord.

Bang!

The powerful impact instantly exploded the head of the Demon Lord like a watermelon.

Black blood spurted out in all directions, and the insufferably arrogant Demon Lord died.

After dealing with the Demon Lord, the remaining soldiers were quickly cleared away by Keaton's minions.

Sitting on the valley floor, Keaton panted heavily.

However, at this moment, the sound of horse hooves came from behind him.