Grell was the first person devoured by death energy, yet unlike the other victims, he did not howl in agony. Instead, he reveled within the Black Mist.
He had finally broken free from the shackles of mortality and become a vengeful spirit transcending life and death.
This disaster not only granted him an immortal body, but also fully unleashed his cruel nature.
His appearance gradually mutated, eventually taking on the iconic form of chains and a lantern.
After becoming an undead, Thresh naturally became even more depraved, taking pleasure in torturing souls.
He discovered that other undead could retain only fragments of their memories from life. He alone retained all of his memories, along with his treachery and cunning.
When he came to the heart of the Shadow Isles to pull the Blade of the Ruined King from Viego and revive him, he was naturally not acting out of kindness. He intended to use Viego to spread the Black Mist outward.
He had already grown tired of playing with the souls on the Shadow Isles alone. He needed more souls, more interesting ones, for his amusement.
When Thresh pulled the Blade of the Ruined King from Viego's body, Viego finally opened his eyes.
"Isolde!"
The moment Viego opened his eyes, he called out Isolde's name. He really was devoted.
He picked up the Blade of the Ruined King and looked at Thresh.
"Your Majesty, if you wish to revive the queen, you must gather all of her soul. The queen's soul has now shattered into thirteen pieces scattered throughout Rune Land. What will you do?"
For Viego, who regarded reviving Isolde as the purpose of everything, the answer was obvious.
With the Blade of the Ruined King in hand, the Black Mist across the entire Shadow Isles began to surge.