I Obtained a Mythic Item

Yggdrasil, the World Tree of Norse Mythology, suddenly appeared on Earth. And with it came demonic creatures that ravaged entire cities. Although not all hope is lost, due to the System that a few special humans had gained. In this new world where only the strong survived, Min JaeHyun scrapes by regretting the wrong choices he'd made in the past... when one day, he gains the only Mythic item in the world. How will this item help him? And can he change his wretched fate?