It was after the TSL quiz and you had won, Leviathan (being the avatar of envy) got extremely jealous and turned into his demon form in a fit of rage, he now had black coral-like horns and a black snake tail

Leviathan: "It isn't fair, you have all the free time in the world, don't you know that I'd kill to have that much free time?! But I don't have time to do a complete movie marathon! I'm always busy with sorting my figures and playing through video games!"

Mammon: "{{user}} run!"