This light and heat is actually another function of the "Shooting Weapon Amulet".
Improving evasion rate and making shooting weapons ineffective are just one of them. Every time it fails, the eclipse gap on the amulet will become larger, the sun will be completely swallowed up, and the amulet will disappear.
Another function is to be used as a one-time bomb. Throwing the amulet at the enemy will cause a burst of strong light and high heat, and the power is proportional to the degree of the solar eclipse.
Therefore, the most correct way to use this amulet is to first invalidate the ranged item, wait until the eclipse accumulates to the limit, and then throw it out to maximize the explosion effect, just like Gilgamesh is doing now.
I have to say that His Majesty the King of Heroes is really full of bad taste sometimes. He knew that Karna was the son of the sun god and that the armor on his body was the "Sun Protection", but he still used the sun-attributed treasure to attack.
The effect of the attack certainly could not be good, otherwise the sun god Surya would be too unworthy of his name, and the reputation of the thunder god Indra would also be damaged - you know, the thunder god took great pains to trick the armor from Karna, which gave his child Arjuna the opportunity to kill Karna.
Amid the strong light and high heat, stronger light and fire burst out, as if to prove who is the real son of the sun and who is the real "little sun".
The golden armor leaves gathered behind him opened one by one, and the purest solar flames were released from them, dispelling the impure brilliance and swallowing the flames that were not strong enough. Just by "releasing magic power", Karna made the power of the Eclipse Gold Ornament invalid. Not only invalidated it, but also turned it into his own use.
The Son of the Sun, who was staying afloat with the help of flames, glanced at Gilgamesh, who was at the same height. Just this one glance made the heroic king, who had always been high above, fall from the clouds.
This eye is Karna's treasure - "Brahmastra, O Brahma, cover the earth", a derivative version of "A true hero kills people with his eyes".
It is impolite not to reciprocate.
Gilgamesh had used his Noble Phantasm so many times that Karna no longer kept it secret and responded with his own Noble Phantasm.
A counterattack is the fastest and most difficult to defend against attack.
There are people who can dodge this attack, but they must be strong people like Scathach who have trained their martial arts to the extreme. There are also treasures that can block this attack, but they must have the same reaction speed as light.
Unfortunately, Gilgamesh did not meet these two conditions, or before he could open his eyes, the Brahma ray pierced through his chest.
Fortunately, the chain mail Gilgamesh wore was specially designed to deal with Karna, and it had special resistance to attacks from fire and the sun. This protected his soul core and prevented it from being killed by the Brahma Rays.
Karna did not give the enemy a chance to breathe, and the follow-up attacks followed one after another. But Gilgamesh was prepared, and before he could launch the second attack, the "King's Treasure" version of the metal storm surrounded him again.
At the same time, he did not forget to protect himself, and surrounded himself with dozens of shields. No matter if you shoot arrows or radiate rays directly, it is impossible to penetrate such a defense in an instant.
In this way, Gilgamesh bought enough time to take out medicine to treat his injuries. As long as the hero king who possessed the "King's Treasure" survived, he could recover quickly under the effects of many treasures. After that, he changed into a set of armor without haste and stood in front of Karna who had fought his way out of the siege.
"Yes, you are very good. This time in this world has given me too many surprises. First there was the Queen of the Demon Realm, then the King of Conquerors, and now there is you, Karna. Hahahaha, this time I can really stretch my muscles."
At this moment, the Hero King's snake-like eyes no longer had any interest in collecting, nor any anger towards the offender. All that was left was curiosity about the strong, and the joy of meeting an opponent worthy of a fight.
"Let me decide whether you are worthy of my treasure! Keep showing your strength, Karna."
The distortion around Gilgamesh gathered in one place, and a huge sword appeared in the center of the distortion.
Merodach is said to be the original sword of the chosen sword that spread throughout the world, and the embodiment of the concept of "selection".
There is no doubt that he intends to use this sword to select and confirm whether the other party is qualified to let him pull out the supreme object equivalent to half of his body from the deepest part of the treasure house.
Karna then raised his bow and showed a solemn expression for the first time since the war began. An unprecedented amount of magical power gathered between his hands.
"Then I will also respond with all my strength, Hero King Gilgamesh."
From the moment the Brahma Ray failed to kill, he knew that this battle could not end quickly. He had to deal with this opponent with all his strength, without any reservation. Although doing so would increase Luvia's burden, it was also for the Master's wish.
"Come on!" Gilgamesh raised the sword in his hand high with a half-expectant look.
“Let’s go!” Karna stood there majestically, pulling the bow to its full length.
Two top-level heroes, both wearing golden armor and possessing the highest status, stared at each other.
The smiles to each other were the signal to start the battle, and both of them released their attacks at the same time.
Gilgamesh swung down the Sword of Selection.
It is true that the Hero King only collects Noble Phantasms and asserts his sovereignty over them, but except for a few that are closely related to his deeds, he cannot bring out the full power of each Noble Phantasm.
However, this sword is different. As the king praised in the oldest epic, he is the key figure in separating humans from gods and causing the decline of mystery. It is not an exaggeration to say that he is the true beginning of human history. His existence itself is a symbol of selection. It is a natural fit with the concept of "original sin".
The mere act of swinging the sword gave the air, no, the entire environment, a distinct sense of hierarchy. This sword was not only a choice for Karna, but also a choice for the entire battlefield. Those who could not withstand it were not qualified to continue.
It was at this moment that Karna released the bowstring and loudly released the true name of the Noble Phantasm.
"O Brahma, curse my body (Brahmastra kundala)!"
An avalanche of destructive light swept across the battlefield that had just been identified by the King of Heroes.
Perhaps its accuracy is not as good as "Brahma, cover the earth", but its power is far greater. This is Karna's strongest attack under normal circumstances.
Finally, the destructive Sun Arrow and the selected segment of the Sword of Original Sin met in the center of the battlefield.
In an instant, the sky collapsed and the earth shook. The only things that remained unshakable were the two golden heroic spirits who were in it.
PS: Although it may be a bit exaggerated, Gilgamesh's decision to separate humans from gods can indeed be regarded as the true beginning of human history. It is more appropriate to say that it is the history of gods than the history of human beings. (Type-Moon World)
PS2: The name of the treasure is "Shooting Weapon Amulet". It is also in Magic, the effect is clearly written, and the level is also unknown.