Of course, the King of the Underworld doesn't have it, but it does.
First, it can unrestrictedly view past lives, needing only to consume the netherworld power within. Levi can save the remaining Rebirth Stones.
Second, it can summon the Mother River's descent, absorbing the power of the Mother River for healing, combat, escape, etc. This kid was definitely the Nether Emperor in a past life and is likely a direct offspring of the Mother River, not one who later sided with the Underworld.
Third, Leon can also form his own Underworld army, appointing the King of the Underworld and Netherworld Generals.
There are many other authorities belonging to the Nether Emperor.
The little one is gradually awakening and adapting to his abilities; in short, his combat power is already suppressing middle-level 9 demons, and his potential is significant.
...
Hell Seventh Layer
Dragon Fall Valley.
The former land of the Undead has now become a terrifying Demon Land.
