In the small space, the death energy that is almost condensed into substance is constantly rolling, bringing a breathtaking majesty, and the faint fire light around it cannot reach the deepest part of the death energy, but can only imprint the faint outline of the creatures inside.

A huge black shadow is in the center of the death energy surrounding, constantly accepting the changes brought by the death energy to its body, along with the dull breathing, the momentum it exudes is becoming more and more intense, and there is a tendency to continue to increase.

If a caster of spell rituals arrives, they will be shocked by what they see, and the energy of death will continue to gather here under the influence of the ritual, benefiting the creatures in the center of the ritual.

Conventional spell rituals can't achieve this effect, and the only ones who can achieve this can integrate necromancy into the ritual are those who are extremely powerful.

In the space on the upper floor of the Spiritualist Tower, a special ritual took place here, and at the outermost part of the ritual, Rhodes, as the leader of the ritual, was watching all this happen, and constantly releasing his own death energy and integrating into the entire ritual.

The existence of god-level spiritualism has allowed Rhodes to master a large number of necromancy rituals related to it, relying on the power of the ritual to improve the rank of undead creatures, and among all the necromancy rituals, it is already considered an extremely top existence.

There are not many necromancers who are qualified to guide the ritual in front of them, relying on their own death energy to forcibly improve the rank of the undead creatures under their hands, and the conduct of this ritual has extremely high requirements for the necromancer himself, and the existence of god-level spiritualism undoubtedly gives Rhodes such an ability.

The black shadow in the center of the ritual is none other than the centaur leader under Rhodes, and at this time, it is receiving the ritual's increase in its strength.

Prior to this, after continuous battles, according to Rod's perception, the rank of the centaur leader should have reached the level of about the fifth order and the eighth order, and because of this, with the help of the ritual, Rod planned to let him directly break through the limit of the sixth order and enter the ranks of epic creatures.

In Rhodes's impression, high-level undead creatures have two different promotion directions, one is like a ghost dragon, with a large amount of nether energy on its body, and can rely on nether energy to inflict serious negative damage on the enemy in battle, and the other is like a horror knight, relying on its own basic attributes to fight.

For these two different promotion methods, Rhodes can take the initiative to choose, and according to the choices made by Rhodes, the subsequent centaur leaders will also receive the corresponding specialty blessings after promotion.

Due to the Centaur Leader's ability to fight in close combat, Rhodes did not give it a body shrouded in nether energy, but instead gave it a more powerful base stat and an attack perk similar to the Terror Knight, which can trigger a critical hit.

Under Rhodes' guidance, the surrounding death energy continued to surge towards the centaur leader in the center, its body became larger and larger, and its already cold body also became swollen at this time, and a power belonging to a high-level creature began to emerge on its body.

At this time, the potential belonging to the death knight is undoubtedly reflected in the centaur leader, in Rhodes's perception, the centaur leader at this time has already entered the ranks of sixth-order creatures, and it is not as simple as just entering the sixth-order, at least to the level of the sixth-order fifth-order.

Before upgrading the rank of the centaur leader, Rhodes took the first step to raise the rank of the vampire, but the effect was not ideal, but the original fifth-order second-level vampire was raised to the level of fifth-order and ninth-level, and it did not let its rank be promoted.

Judging by the results, the promotion ritual is far less effective on vampires than it is on centaur leaders.

Rhodes understands that the promotion of the rank of undead creatures is largely related to the potential they have, and the greater the potential, the greater the undead creatures, the greater the natural improvement.

The centaur leader with the identity of a hero, its potential, consistent with other heroes, has crossed the limit of its own kind, and can even be said to have reached an infinite level, but it needs to match the hero's will, even so, the hero's potential is still not comparable to ordinary creatures.

No creature can surpass the existence of a hero in terms of its own potential, and those who have a very high rank after adulthood, such as dragons, unicorns and other special beings, as long as a hero is born in their group, it is equivalent to the emergence of top legendary creatures.

Under the effect of the ritual, Rhodes successfully allowed his important undead creatures to complete the advancement, during which he realized that the control of mental attributes was somewhat insufficient, and Rod relied on the effect of the aromatic secret method to absorb a lot of potions, which met the requirements of controlling the undead creatures.

Soon, all the death energy in the field was absorbed by the centaur leader in the center, and the whole ceremony was nearing its end.

When the dark fog completely cleared, the field was illuminated again by the firelight from the tower wall, and what appeared in front of Rhodes was the leader of the centaurs who had been promoted to the rank.

The huge battle axes in Rod's impression were hung around the waist of the centaur leader, and under the light of the fire, they shimmered brightly, compared to the huge size of the centaur leader at this time, these two battle axes were extremely suitable when held in his hands.

What existed in the centaur leader was not the breath of any netherworld energy, but an unstoppable momentum, which was a powerful aura belonging to high-level creatures.

Relying on the promotion ceremony in the god-level spiritualism, Rhodes raised the centaur leader under his command to the sixth-order level, but the subsequent promotion exceeded the limit of this ritual, and it is not a simple matter to obtain the undead creatures of the legendary rank, except for the initial transformation of the corpse of the legendary creature, there are few other ways to achieve it.

Among the undead creatures, it is thought that few legendary creatures are born, even if the ghost dragon with strong strength is only at the apex of the sixth order, and it is not known how long it will take to truly become a legendary creature.

At this time, the legendary undead creatures that were really controlled by Rhodes seemed to be only the Nethersea Kraken in the Water Elemental Plane, and the spiritual imprint that existed on the Nethersea Kraken was still derived from the effect of the Mother of the Revenant.

Thinking of that extremely powerful legendary undead creature, Rhodes knew that his control of spiritual attributes at this time was still not enough, even with the existence of a potions factory, he didn't know how long it would take to create enough potions to improve the control of spiritual attributes to the level he was satisfied with.