After Spending Hundreds of Years as a Common Undead, I’ve Become The Strongest Undead When I Woke up (Associated Names)

Zion, a solo adventurer, recklessly entered a dungeon beyond his ability. Alas, that was the last thing he did. Wandering inside a dungeon for hundreds of years, as an undead, he kept advancing into the dungeon. Slaying monster left and right until his undead body underwent ‘evolution’ many times over―― ―― By the time he…