https://manhwa-manga13.bid/2020/03/tower-of-god-476/
[Karaka's Heart]

HCH: ... where am I? I hit one of Karaka's balls of black Shinsoo, and then I suddenly got dragged down here...? What is that?
???: Oh! How bothersome! I was hoping nobody would come. In exchange for allowing the infiltration by imprisonment here, he requested that I take care of the enemies he sends here. But to think he would send a high ranker...
YHS: You are an opponent more dangerous than I expected, but I shall stop you!
HCH: Yu Hansung? The (Forgot what type of fish) of the Floor of tests?
YHS: It is an honor to be recognized, milady.
HCH: How are you... where is this place!
YHS: Sorry, that's a trade secret! (I can tell you my instant coffee recipe though!), so I am not at the liberty to say. So please, set aside your curiosity and come play with us for a while!
HCH: If you don't want to tell me, I will make you tell me after a good beat down!

[52F A Chaotic Battle -04-]

Karaka: I will kill you and save my teacher Kallavan!
Kallavan: Try it and see what happens!

[Essence of the Void/Essence of Bravery]

Karaka: Viole! Cover me! Distract him!
Baam: You got it!
Karaka: (We'll pretend to be performing a combo attack, then I'll make an opening. Viole can use the split second to undo the spell on the wall)
Kallavan: That kind of half-assed attack can't touch me!

[Dark World]

[Long Pierce - Nine Dragon]

Kallavan: (Wasn't he the defensive type? He's keep charging at me)

Karaka: Teacher...
HJS: Do you like your gift Karaka? It may be a bit different, but since you've worn armor before, so it shouldn't take too long to adjust.
Karaka: Yes, teacher. Thank you for the gift of this amazing armor. I will use it to fulfill our hopes and dreams one day.
HJS: This gift is not so you can take revenge. It's for you to survive. You've become a Slayer at such a young age, so you'll face more enemies in the future. That armor will save your life. So don't give up your life for our hopes, or for your revenge. Live. You living is my hopes and dreams, Karaka.
Karaka: Teacher, I- I don't think I can make your hopes and dreams come true.

[Armor Inventory - Suit of Armor: Fullmetal Storm]

Karaka: One day I will risk my life to fulfill my own hopes and dreams, and now- I'm risking my life to save you.

[Karaka Style Resonant Wave Technique: White Day]

[Karaka Style Second Tier Resonant Wave Technique: White Day Double Strike]

Kallavan: A well executed Resonant Wave Technique. But it falls short of your teacher.
Karaka: (No damage?!)
Kallavan: You can't damage me like this. To aim for the King's head with this is laughable. Your teacher once offered me the seat of Slayer. I didn't take it. The Seat of Slayer is a place where false gods are made. They are gods of evil, growing through consuming the hatred against the king. They are a false god that exist because of king. Ha Jinsung grows a false god because of his hatred. I hear that you revive upon death. So I won't kill you. I'll rip off your limbs, and take you alive as is. I will show the Tower how weak and powerless a Slayer is.
Baam: Mr. Karaka?
Karaka: I'll hold him off! Go to the wall!
Baam: I can't do that!
Karaka: If you can't do that, then run! He's stronger than we've imagined! If you die now, all of this is for nothing! Live on! Undo the spell on the walls!
Baam: But-
Karaka: We can't save our master without you Viole!
Baam: On that end, I still have to go through Dowon. As is, we won't be able to undo the spell and launch the needle properly. And even if we do somehow pull that off, without Mr. Karaka, Teacher will...
Baam: I am not leaving you behind, Mr. Karaka!
Kallavan: (The Irregular...)
Baam: I may dislike you still, but ever since you told me that you would help me save our teacher-
Karaka: Viole no!
Baam: that you and I are two pupils of the same teacher! So I will defeat Kallavan no matter what! And with you by my side!-

[Twenty Fifth Baam Style Resonant Wave Technique: Zero]

Baam: We will cross this wall!
Karaka: Damn... well, if it can't be helped, keep attacking him!
Baam: Understood!

[Shinwonryu]

Kallavan: Keuk!
Baam: (Just now! There was a reaction to Shinwonryu! Unlike the other attacks that Kallavan's been ignoring, he did react to Shinwonryu. It's just as teacher and I predicted. Kallavan doesn't react to attacks that don't deal damage to him. So even if I attacked him from the behind for my first attack, he didn't react to it because it didn't deal any damage. But when I tried to attack with Shinwonryu, he reacted immediately. He thought there would be a small but definite amount of damage. But I can't approach him with his reaction speed. How do I use Shinwonryu on Kallavan? I can't use Shinwonryu infinitely like Shinsoo.

Narrator: It was then that the two students of Ha Jinsung was thinking the same thing as they faced Kallavan.

Karaka: His attack is too, but his defense is simply incredible. How was our teacher able to critically damage him? How?! Kallavan is like a one man fortress, one impenetrable.

Narrator: To them, conquering this fortress was a difficult assignment given to them by their teacher, and that if he couldn't be conquered, neither reunion with the teacher or victory in this war would be possible.

Baam: I was thinking about this the wrong way. Let's ignore the wall behind me for a moment. I can't go anywhere with this man in the way.

Evankhell: What to do when you see Kallavan on the battlefield: There are three options. One: If possible, escape. That's the best option (because you can't defeat him). Two: If you can't escape, stall and wait for reinforcements. Kallavan does not react more than he needs to, from what I've seen. If you don't initiate, you may be able to bide some time. Three: This is the worst option, but if you absolutely must fight, don't worry about what comes after, fight with everything you got.

[Orb!]

Evankhell: You have a small needle with which you can hurt Kallavan.

Karaka: Orb! So big!
Kallavan: He can wield three now?

Evankhell: Sometimes, the smallest needle can leave the most lethal damage against their opponent.

END