It took a while for Leon to understand how Foresight worked. Basically, the time in his head passed two times faster in comparison to the time outside his head while the skill was active. For example, by keeping the skill activated for two seconds, Leon would be able to see the things that would happen two seconds later... It wasn't an overpowered skill as Leon had imagined, but as long as he keeps recovering his mana and also his practice the skill, he would be able to overcome even the cooldown time.
"I can't use other skills while I use Foresight... so the best way to train the skill is by using the mana on my Soul Eaters," Leon concluded. "The problem is, while I can see the future, the future might change according to my actions. So, it isn't a good idea to rely on Foresight during a battle."
Leon couldn't help but think that the price of the tome was a bit too high considering that, but it was clear that he didn't know the best ways to use that power yet, just like he didn't know at the beginning that he could summon a weaker replica of himself when he learned Mind Summoning.
Congratulations! The skill Foresight has leveled up.
You obtained 01 status points.
Congratulations! The skill Foresight has leveled up.
You obtained 01 status points.
Congratulations! The skill Foresight has leveled up.
You obtained 01 status points.
...
Although it took a while for Leon to notice it, even Foresight could become more efficient. Once he used the mana stored in a Soul Eater and leveled up Foresight, he noticed that by each level up the speed, he could see images of the future increased. Most likely, for every level up, the efficiency of the skill increased by one percent, and once Foresight reaches the max level, Leon would be able to receive images of the future ten times faster.
"At the max level, I will be able to see everything that happens in the next ten seconds in just a single real-time second," Leon concluded. "I wonder if my brain can keep up with that much information."
Finally, Leon could see a part of the true potential of Foresight. Still, considering the cost of the skill and the fact that he couldn't use Fast Conjuration or Multi-Conjuration, it would take a long time to level up such skill, and Leon couldn't slack off on his regular training.
Congratulations! You have learned the skill: Explosion.
Cost: 5000 mana
You obtained 01 status points.
Congratulations! You have learned the skill: Fiery Dance.
Cost: 200 mana and 200 stamina
You obtained 01 status points.
Congratulations! You have learned the skill: Fire Spin.
Cost: 200 mana
You obtained 01 status points.
Congratulations! You have learned the skill: Ice Spin.
Cost: 300 mana
You obtained 01 status points.
Congratulations! You have learned the skill: Thunder Spin.
Cost: 300 mana
You obtained 01 status points.
Congratulations! You have learned the skill: Gust.
Cost: 100 mana
You obtained 01 status points.
"Mmm... maybe there is a way where I can train all those skills and Foresight at the same time," Leon rubbed his chin. "But I'm not smart enough to imagine it. My replicas can't exactly help me with that since they also consume a lot of mana. Even if I teach them Mana Magnetism, I don't think that is a skill their bodies can handle... and to make stronger copies of myself; I would have to use more mana. What a splendid vicious cycle..."
Perhaps Leon would be able to increase the range of Mana Magnetism once he leaves that dimension just like did it a few times with Mana Dominion, but he would have to wait for that.
A few years passed, and Leon finally noticed something, not all types of monsters have appeared on Earth. He couldn't recall the exact number, but he was pretty sure that there weren't more than one hundred dungeons on Earth that connected to other worlds that were on the fourth stage of assimilation. Despite that, the number of monsters he had faced so far since the end of the third wave of zombies was over one hundred fifty.
"Maybe that is why the liches dungeon didn't appear on Earth... or perhaps the shadowy figure gave up on Earth since other harvesters were already working behind the scenes," Leon said.
That was another question that Leon wouldn't find an answer before he leaves that imaginary dimension, so he decided to forget about it. One of the dangerous things about deleting memories was the possibility of Leon thinking precisely the same thing again, so to avoid that kind of thing from happening, Leon didn't delete from his memories, that kind of moment.
Congratulations! You have learned the skill: Headbutt.
Cost: 100 stamina
You obtained 01 status points.
Congratulations! You have learned the skill: Hydro Vortex.
Cost: 100 stamina
You obtained 01 status points.
Congratulations! You have learned the skill: Pyro Vortex.
Cost: 100 stamina
You obtained 01 status points.
Congratulations! You have learned the skill: Icicle Crash.
Cost: 300 mana
You obtained 01 status points.
Congratulations! You have learned the skill: Icy Wind.
Cost: 300 mana per second
You obtained 01 status points.
Congratulations! You have learned the skill: Max Flare.
Cost: 500 mana per second
You obtained 01 status points.
Regardless, after leveling up the latest skills to a certain level, Leon learned a few new ones. However, despite that, he was already checking Ilyana's vault to find something more useful and buy it.
"It is getting kind of hard finding new and still stupidly powerful skills like Foresight and Mind Summoning," Leon concluded. "Now that I think about it... can I summon something from the future?"
Although that was insane, at least that showed to Leon that his mind was still working properly in finding crazy ways to apply his powers.