Mage Again 

Rangderkessel, the greatest mage of the land, sacrifices his life to seal the king of destruction, Persiadis, in six sacred relics. The relics are distributed among six different hands to be kept safe, and once again, peace is restored. However, when someone begins to collect the relics to resurrect the demon, Rangderkessel awakens from a 600-year slumber as the boy “Ranghae.” (Source: WEBTOON)