
So I don't know how many spoilers you want (I really recommend reading the novel) so I'm going to give some spoilers of this arc (I read this arc some time ago so if something is wrong I apologize.)
Spoilers.
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In this arc I PROMISE things will get dark
So when Arthur gives Tessa the Beast Will, he doesn't know that the nucleus is corrupted and it turns out that Tessa won't be able to get used to it very well She will be really bad, but he manages to help her (something that will be explored later and I promise the things get good)
On a study trip that they take to a dungeon, things end up badly, and Arthur ends up falling off a "cliff" (who is nothing new) and there he will discover one of the Spears (those strongest people on the continent) Arthur will find her spear alive (or what's left of her actually) and the spear tells him before she died that only one person managed to kill her and all her companions
(a battalion of soldiers) and that there is much more that will arrive to take over the continent.
Then afterwards we discovered the reason why the three races (elves, humans and dwarves) came together and formed the council, because during this whole time the entire continent of Dicathen was being watched by a neighboring continent that is a possible threat
And let me say THERE WILL BE WAR.
And things will start to go wrong when they invade the Academy, the good part is that Arthur kills Lukas (that traitorous half-elf) the bad part is that Elijah is kidnapped. :( (And even more spoiler, the reason has to do with Arthur's past life)
This was really a half summary of a bigger picture, this is one of the last arches in which everyone is happy and alive :(
and I'm sorry if my English is too bad, I'm not fluent at all :)

So I don't know how many spoilers you want (I really recommend reading the novel) so (● '◡' ●) ノ I'm going to give some spoilers of this arc (I read this arc some time ago so if something is wrong I apologize.)
Spoilers.
.
.
.
.
.
.
In this arc I PROMISE things will get dark
So when Arthur gives Tessa the Beast Will, he doesn't know that the nucleus is corrupted and it turns out that Tessa won't be able to get used to it very well She will be really bad, but he manages to help her (something that will be explored later and I promise the things get good)
On a study trip that they take to a dungeon, things end up badly, and Arthur ends up falling off a "cliff" (who is nothing new) and there he will discover one of the Spears (those strongest people on the continent) Arthur will find her spear alive (or what's left of her actually) and the spear tells him before she died that only one person managed to kill her and all her companions
(a battalion of soldiers) and that there is much more that will arrive to take over the continent.
Then afterwards we discovered the reason why the three races (elves, humans and dwarves) came together and formed the council, because during this whole time the entire continent of Dicathen was being watched by a neighboring continent that is a possible threat
And let me say THERE WILL BE WAR.
And things will start to go wrong when they invade the Academy, the good part is that Arthur kills Lukas (that traitorous half-elf) the bad part is that Elijah is kidnapped. :( (And even more spoiler, the reason has to do with Arthur's past life)
This was really a half summary of a bigger picture, this is one of the last arches in which everyone is happy and alive :(
and I'm sorry if my English is too bad, I'm not fluent at all :)

Don’t worry at all! Your English is really good for not being fluent at it. English is one of the harder languages to learn cause of all the pronunciations. Also in America specifically we do so many peeving things like not using Celsius. Also if you spell the word dime and you take a word that sounds like dime, a lot of the time you think “rime,” but it’s spelled rhyme. It’s weird and I don’t know why they make some words that have completely different meanings sound the same but at times spell it completely differently ;-;

Spoilers
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he lived in another world, it's kind of complicated to explain, but before becoming king of that world, Arthur ends up killing a childhood friend who was very powerful and sought after by several organizations of that world. The goal of one of the villains was to use reincarnation on this childhood friend, because when they reincarnate they become stronger and they could then use that childhood friend as a weapon as they did in the past life before Arthur killed her.
Can someone give me some spoilers?