|Kavacha and Kundala|
|Lancer | Launcher|
|Title:||O Sun, Become Armor|
|Owner:|| Lancer of Red|
Kavacha and Kundala: O Sun, Become Armor (日輪よ、具足となれ, Nichirin yo, Gusoku to nare (Kavaacha & Kundaara)?) is the golden armor and earring given to Karna by his mother, Kunti. She felt fear in becoming an unmarried mother and prayed to Surya to protect her son, granting him a powerful defensive-type Noble Phantasm integrated with his body that emits the radiance of the sun. Due to being light itself taken shape, it is difficult for even the gods to destroy. Vasavi Shakti requires the armor to be permanently sacrificed for it to be used.
The armor differs slightly between the two incarnations of Karna. Within the Moon Cell, it is able to protect against being deleted, allowing a human that has it to return to their body after the Moon Cell Holy Grail War even if they are not the winner.
In Indian mythology, the hero Karna is protected by golden armor and earrings. Karna's mother Kunti, worried that she would become an unmarried mother, asked Surya for the golden armor and earrings, to protect her son. The armor is a powerful defensive Noble Phantasm, shining with the light of the sun itself. Since it is solidified light, it is very difficult even for gods to destroy, so Indra tried to nullify it.
According to the myth, Indra transformed into a brahman priest, and visited Karna's mansion, asking him to hand his personal effects over to himself when he went to take a bath. Karna swore that he would not refuse a Brahman's requests when he went to the bath. Even though he knew of Indra's trap, he complied with the request, giving up the armor that was the only sign of his birth.
Although it was stolen in the myth, the servant Karna still possesses this armor. It is as thick as it looks, but it is an invincible armor, which protects against all harm, physical or conceptual. As long as it is active, all damage inflicted on Karna will be reduced to a tenth of its original value.