In the Illusory World, Merlin did not know how many times he had tried to combine the Fire-type Wizard Heart and the Thunder-type Wizard Heart. Although he still failed, as Merlin gradually summed up his experiences, he gained a very deep understanding of the two spells.

Therefore, with the passage of time, Merlin's success rate gradually increased even though he was in the Illusory World, and was only "simulating" fusing Wizard Hearts in an illusion.

"I should be able to give it a try now!"

Merlin's Mind Projection in the Illusory World instantly disappear. When he opened his eyes, his entire person felt different.

In the Illusory World, he already lost count of the number of times he "died". Even if it was an illusion and a simulation, Merlin still greatly benefited from it.

Courage was needed before life and death. In the Illusory World, Merlin had encountered many cases where he was obviously going to fail. However, he did not step back, and instead, went forward all the same, determined to combine the spells.

In the end, with his perseverance, the fusion succeeded. Although the probability was very small, it had a great impact on Merlin.

After countless fusion "simulations", Merlin's success rate in the Illusory World had already reached more than eighty percent. This was a frightening number. With such a high probability, even if it was from a simulation in the Illusory World, it still filled Merlin with confidence.

Therefore, Merlin was finally ready to try fusing the Fire-type Wizard Heart and the Thunder-type Wizard Heart in reality.

Merlin immersed his consciousness inside his body. Currently, in his Awareness, there were no complicated Spell Models. There were only six Wizard Hearts.

These Wizard Hearts exuded powerful life forces. Although it was not as complicated as a Spell Model, their power was much stronger than that of the previous Spell Models.

Merlin directed his focus on the Fire-type Wizard Heart and the Thunder-type Wizard Heart. This was the Two-Elemental Wizard Heart that Merlin simulated the most in the Illusory World with a success rate of over eighty percent.

However, it would be the first time he was combining them in reality!

Merlin made a very heavy decision to combine the Wizard Hearts. Previously, he used the Matrix to construct Spell Models and they were always stable. Therefore, there had never been any danger.

However, it was different this time. The Matrix was of no use to Merlin and could not help Merlin combine the Wizard Hearts. Now, Merlin had to rely on himself. Everything had to be analyzed and attempted by him.

If it failed, it would very likely end up like how it did in the Illusory World. He would be blown apart by the exploding Magic Power or his Wizard Heart would completely collapse. Merlin would become an ordinary person, unable to become a Spell Caster ever again.

The price of failure was something Merlin could not afford!

However, Merlin had to take this step even if he could not bear the heavy cost.

"Phew…"

Merlin breathed a sigh and tried to calm his mood.

"Combine!"

Finally, Merlin mobilized the Fire-type Wizard Heart and the Thunder-type Wizard Heart. The two different types of extremely violent Wizard Hearts started to draw closer under Merlin's control.

Just like in the Illusory World, Merlin was very familiar with this series of actions. He knew every detail as well as what might happen.

However, he just did not know if it would be as smooth as in the Illusory World.

As Merlin gradually brought the two Wizard Hearts together, something unexpected happened. The two Wizard Hearts had not come into contact but there was already some shaking, causing instability in his entire Awareness.

A Spell Caster's Awareness was incredibly unstable. Just a little turmoil could cause the Spell Models in the Awareness to collapse. In the Illusory World, Merlin had experienced several times where he failed because of turbulence in his Awareness, causing the other Wizard Hearts to collapse.

Therefore, Merlin also felt his Awareness begin to shake. His heart trembled but he had no way to stop it now. The two Wizard Hearts were approaching rapidly.

His Awareness was getting more turbulent as if it could collapse at any moment. Merlin's expression was very grave. He had never thought that such an accident would happen in his first attempt in combining Wizard Hearts in reality.

If this continued, the fusion would very likely end up in failure, and the consequences would be even more unimaginable.

"I can't let my Awareness continue shaking like this."

Merlin gnashed his teeth, and mobilized all his Mind Power. The huge Mind Power was like a torrent that Merlin used to stabilize the turbulent Awareness.

This method was indeed useful. Merlin's Mind Power was far superior to an ordinary Mind Power Master's and could be used to stabilize the Awareness. However, this also consumed a large amount of Mind Power. If he did not combine the Fire-type Wizard Heart and the Thunder-type Wizard Heart in a short period of time, then his Awareness could completely collapse at any time because of the turbulence.

"Tss."

Finally, the two Wizard Hearts started slowly combine but as soon as they touched, a terrifying storm raged. Thankfully, Merlin's enormous Mind Power was able to stabilize his Awareness. Otherwise, the aftermath of the Two-Elemental Wizard Heart's first contact would be enough to make the Awareness collapse.

"I didn't think this through enough and make it absolutely foolproof. I should have used my Mind Power to stabilize the Awareness before combining, just in case!"

Merlin also summed up the experience. The first time he tried to fuse Spell Models in reality, he had encountered an unexpected situation. Fortunately, he managed to use his Mind Power to stabilize his Awareness in time. However, this also let Merlin realize just how dangerous it was to combine Spell Models.

It was not surprising that many ninth-level Spell Casters did not dare to combine Spell Models even after hundreds of years. It was because merging Spell Models was too dangerous. Once they failed, they would never have a second chance.

"Tss-tss-tss!"

The two Wizard Hearts had only been partly combined but they had become more turbulent as if the two Wizard Hearts could collapse at any moment.

Merlin closed his eyes, and countless images flashed in his mind, most of which were images when he was "simulating" fusing spells in the Illusory World.

Among them, it was very common for the Wizard Heart to shake violently when the merging reached the halfway point. However, the final result was often failure!

The Wizard Hearts grew more and more unstable, and Merlin could even feel an aura of "death".

At this point, the only thing Merlin could do was use his Mind Power to stabilize the violent shakes of the Wizard Hearts. His heart suddenly missed the Kingdom of Blackmoon.

Merlin thought of Old Wilson, Macy, Avril, Charise, the Dark Magic Region, and so on. From meeting old man Etha at Blackwater City and encountering spells, he grew step by step, and entered the Dark Magic Region, becoming a powerful Wizard.

All of this turned into images in Merlin's mind.

"I still want to return to the Kingdom of Blackmoon and fulfill my promise from back then. I want to return to Blackwater City to retake Wilson Castle…"

Merlin's calm Mind Power seemed to be boiling at this moment. Looking at the increasingly turbulent Wizard Hearts, Merlin went all out. His unwavering conviction also integrated into his Mind Heart.

"It absolutely can't collapse. Combine, you have to combine!"

Merlin's cold eyes revealed a trace of madness. He directly used his powerful Mind Power to forcibly interfere with the fusion of the two Wizard Hearts.

From all directions, the Mind Power forcibly "combined" the Fire-type Wizard Heart and the Thunder-type Wizard Heart. Merlin also did not know if there was any effect but at this point, he definitely could not give up!

"Boom."

After an unknown amount of time, Merlin's Awareness shook, and he discovered that the Fire and Thunder-type Wizard Hearts had disappeared. Merlin looked in his Awareness, and saw a unique Wizard Heart that was emitting dazzling golden light slowly appear...