Before Leon could repeat the same mistake, he decided to buy the tomes that granted him the power to summon all types of skeletons as soon as the island was full of the ordinary ones. Given how fast those creatures were dying, soon, he would have to summon more of them, but that was a problem for later.

Congratulations! You have learned the skill: Summon Skeleton Archer.

Cost: 5000 mana

Cooldown time: 10 seconds

You obtained 01 status points.

Congratulations! You have learned the skill: Summon Skeleton Knight.

Cost: 5000 mana

Cooldown time: 10 seconds

You obtained 01 status points.

Congratulations! You have learned the skill: Summon Skeleton Wizard.

Cost: 5000 mana

Cooldown time: 10 seconds

You obtained 01 status points.

Congratulations! You have learned the skill: Summon Skeleton Rider.

Cost: 15000 mana

Cooldown time: 10 seconds

You obtained 01 status points.

Congratulations! You have learned the skill: Summon Death Knight.

Cost: 50000 mana

Cooldown time: 10 seconds

You obtained 01 status points.

"Mmm? I didn't notice that before... but why the cost of mana to summon them is so high?" Leon frowned. "I didn't have to use so much mana when I had that magic staff."

That was very weird, but considering the potential of such skills, it was only obvious that the cost would be higher. It would be stupid to summon thousands of level max skeletons using just fifty points of mana. Regardless, now that Leon got rid of such thoughts, he wondered if it was really fine to use skeletons. They were undead creatures, and Leon used them many times before without thinking... but it wasn't like summoning dead creatures? Although Leon wasn't using corpses as a catalyst, those things must have come from somewhere.

"It is a bit late to do that, but... I'm worried," Leon scratched the back of his head.

Regardless, Leon didn't have time to think about that because goblin champions were massacring his ordinary skeletons. Much for Leon's surprise, they even have the power to summon lesser earth and fire spirits.

"There is no mistake... since they only can summon lesser spirits of those elements, it is evident that they are from that world," Leon said. "I didn't ask Sekundez if she had ever left that place, but it is definitely weird that she saw those creatures. I'm pretty sure there are no purple crystals around her temple or in wherever her temple is."

Maybe it was a good idea to use Hypnosis, make some of those goblins use Stone Skin for a few days, and then make Leon absorb those memories, but soon he gave up on that idea. Imaginary monsters or not, Leon didn't want to make use of any living creature just to help him a little. It would be no different for summoning living monsters and make them fight for Leon. He couldn't let himself become like his enemies who could only see other living beings like stepping stones that could be used to make them stronger.

"I already recovered the coins I spent to buy Omnilingualism. In a few more years, I will be able to buy Mind Summoning," Leon concluded after checking his status. " After that, learn Mindscape Materialization might be a good idea. I want to experiment with a lot of things with it."

Now that Leon solved the problem with the extra memories, he was also planning to increase the speed of the passage of time in that place. Still, he couldn't get greedy. Otherwise, he might fall on the path of his enemies. If Leon summons Death Knights and make them level up to the max level, Leon could probably use Hibernation and sleep for fifty years, and they would still have things under control. Unfortunately, Leon couldn't do that and lose the chance to level up his skills.

Congratulations! The skill Summon Skeleton has leveled up.

You obtained 01 status points.

Congratulations! The skill Summon Skeleton has leveled up.

You obtained 01 status points.

Congratulations! The skill Summon Skeleton has leveled up.

You obtained 01 status points.

...

"Given how weak those skeletons are and also considering that they can appear in worlds in the first stage of assimilation, those skills will reach the max level pretty fast, so I don't have time to use Hibernate all that frequently," Leon concluded. "Besides, if I try to cheat too much, maybe Sekundez won't be satisfied with the trial. I have no choice but to keep things as they are."

Leon didn't know if he could do anything that could cheat, even more, considering that he is deleting his memories on a regular basis, but... his deck of options was increasing quite fast with those stupidly powerful skills.

"Anyway, even though I'm not obtaining status points like before, that was already expected," Leon said. "The number of skills I can still learn using Ilyana's vault still is far from the end, but I guess it is time to learn a better version of Anti-Mana Field. The version where I can still use my spells, and my enemies don't... or at the very least a version which that can't be countered so easily."

The easiest way to get rid of those problems was to increase his mana pool and also increase his related physical status, but Leon was greedy enough not to feel satisfied with a competition of raw power. Having a massive mana pool was good and all, but in the end, what Leon truly wanted was an absolute trump card. If he finds one in Ilyana's vault, then Leon would have to think of a skill that is even better and overpowered. The chances of Leon learning eventually one once he obtains the power of time, light, and shadow were high, but he didn't feel like waiting.