The golden light tried to overpower the black cocoon, creating many yellow fissures on its surface, but it was not enough to pierce it. The cocoon resisted, protecting Seth from any possible harm. But the elf that was nailed with that arrow couldn't say the same thing.
As the golden arrow released its energy, trying to destroy Seth's technique, most part of it was released inside of his body. The golden glow made him feel as if thousands of ants were crawling on his skin, destroying his cells.
"Argh!"
He yelled in pain, but Elyon was merciless on that strike. The energy released was from his Profound Mana Realm cultivation base, something a Mana Control Cultivator couldn't handle.
After many golden pulses were released, his body wasn't able to handle and many of his internal organs ruptured. He died while serving as fodder for Elyon's test.
Now he knew an arrow like that wouldn't be able to take Seth by surprise.