After making his decision, Leon shot Mana Bullets toward all directions while aiming at the zombies' heads. As expected, their heads exploded, and they fell on the ground. However, a few moments later, even headless, the zombies started to move toward Leon. Although his mechanical spiders were constantly ripping the zombies apart, the creatures didn't stop.

"If they don't die when their heads are destroyed, it is a waste of time try to destroy their hearts as well," Leon said. "There is the only thing for me to do here."

Leon activated his Mana Armor and then used Sunlight Nova. Although the range of the skill was limited, it still was large enough to even damage Leon if he stays close. Regardless, the massive beam of solar energy created by Leon burned the zombies that were close to Leon to a crisp. The only way to get rid of them was too destroy the creatures completely, and it looked like Leon would have to do that several times because one minute had passed, and another wave of zombies coming from the sea was walking toward him.

Congratulations! The skill Summon Sunlight Nova has leveled up.

You obtained 01 status points.

Congratulations! The skill Summon Sunlight Nova has leveled up.

You obtained 01 status points.

Congratulations! The skill Summon Sunlight Nova has leveled up.

You obtained 01 status points.

...

"Well, even though they don't have status, they can be used to train my skills," Leon said.

Leon imagined it would be a waste of time, but he also tried to drain their mana. It failed, but something like that didn't bother him the least. Instead, Leon was questioning why Sekundez was making him experience that kind of thing. Ilyana never mentioned zombies, so it was hard to believe that Sekundez had to deal with them at some point in her life.

"Sunlight Nova destroyed all my monsters, so I can only rely on Mana Magnetism to recover my mana," Leon said.

It was more than enough since Mana Magnetism was very useful, and Leon didn't have to worry about the ambient running out of mana. Leon started to think about what was going while he was destroying the zombies. Considering the appearances of those creatures, it didn't take long for Leon to understand what they were... they were the dominant races of many worlds that didn't survive the first stage of assimilation.

"Still... how can someone use Summon Zombie without corpses?" Leon rubbed his chin. "I guess the only way is to by reading the memories of survivors of diverse races and using Mind Summoning."

After considering several things, Leon concluded a few things. Now that he thought about it, it wasn't necessary to kill a spirit in order to obtain its power. If he was really right and someone used Mindscape Materialization to summon thousands, perhaps millions of zombies to attack Sekundez, it was possible that such a person could also have the power to alter memories... the real goal wasn't to kill Sekundez, it was to weaken her and forcefully delete her memories, give new ones and make her become an ally. Still, considering that she was still there, however, tried failed miserably despite having god-like powers.

"Sekundez's said that I would experience the same things she experienced," Leon said. "So, it looks like when she was just ten-year-old, a powerful individual tried to defeat her... I know that the spirit of the time is powerful, but it doesn't make sense that a young spirit can defeat someone who lived for possibly thousands of years."

Although Leon wanted answers, it looked like he wouldn't get them anytime soon. After defeating thousands of zombies time and time again, hundreds more would come out from the sea a few seconds later. Although Leon could decimate all of them before they could even touch him, he was fully aware that they would bother him for quite a while. Eventually, Leon would have to sleep, and he wouldn't be able to do so knowing that he was so close from the spawning point of the zombies.

"Although Sunlight Nova is very efficient in destroying them, I guess acid can do the trick," Leon rubbed his chin.

After confirming that the zombies couldn't fly and jump all that high, Leon created a massive tower in the center of the island. After using mithril to reinforce the power, Leon used Acid Rain. Clouds that made acid fall appeared at the center of the tower, and as expected, it didn't kill the zombies that tried to climb it immediately. But eventually would do the trick. Leon just had to level up the skill or increase the mana used to keep the spell active.