Descendant of Dagda (One Shot)

When God banished the Devil to Hell, He created Seven Gates scattered around the globe and locked them with Seven Seals to prevent It from conquering the human realm. But over the centuries, It has grown stronger and stronger. One by one, through Its demon generals, It has collected the Six Seals.

Now, only the last Seal remains.

And only but one boy stood in Its way, who barely knew anything about the raging War for millennia, and knew nothing about his ancient and powerful bloodline as the last...

Descendant of Dagda.