Eight Greed Kings

Eight Greed Kings (八欲王) are legendary figures in the New World. 500 years ago, Eight Greed Kings appeared, conquering the world with incredible power. Yet the domination of Eight Greed Kings ended suddenly, by their internal conflict which led them to self-destruction. Nowadays, most of the ruins constructed by them were destroyed, and only city left is under their floating castle, Eryuentiu.

Strength
Extremely powerful, as they have slain most of the Dragon Lords during the battle. Also they left Eight Great Weapons, including their guild weapon (sword). Ivileye mentioned their item "Nameless Spellbook" is worth the price of a single world, so it may be a World Class Item.

Trivia

 * It is certain that they are YGGDRASIL players, as their city produces items only existed in the Earth, like suit or katana, and they owned a guild weapon.