Sweet Wife in My Arms - Chapter 2444

Leiyin accidentally crossed into the One Piece World, and accidentally obtained the Naruto System.

A river song, triggered a legend of the rivers and lakes.
Tian Zun’s life motto: “My sword is the truth.”
Shen Lang’s life motto: “To serve people with morality, those who are dissatisfied are dead.”

- Description from uukanshu (translated)

In the darkest and most cruelest dungeon is the birth of a specie who lives his every day life trying not to fall prey to the claws of the predators.

To survive amongst predators, one most shed off the flesh of a prey and take on the skin of an even bigger predator.

Power Ranking

Note

The numbers refer to existential value, and all lifeforms has it.

ADVENTURER GUILD POWER RANKING

Lv 1 - 20 = F (1 - 49)

Lv 20 - 30 = E (50 - 99)

Lv 30 - 50 = D (100 - 499)

Lv 50 - 60 = C (500 - 999)

Lv 60 - 80 = B (1,000 - 4,999)

Lv 80 - 100 = A (5,000 - 9,999)

Lv 100 - 200 = S (10,000 - 19,999)

Lv 200 - 500 = SS (20,000 - 29,999)

LV 500 - 900 = SSS (30,000 - 49,999)

LV 900 - 1000 = XS (50,000 - 99,999)

SPIRITUAL ENTITY RANKING SYSTEM BELOW

■MONSTERS AND OTHER NON-HUMAN LIFEFORMS

●Apocalypse > 100,000,000 - 1,000,000,000

●Armageddon > 10,000,000 - 99,999,999

●Cataclysm > 1,000,000 - 9,999,999

●Disaster > 100,000 - 999,999

■HUMAN

●Transcendent > 100,000,000 - 1,000,000,000

●Warlord > 10,000,000 - 99,999,999

●Mystical > 1,000,000 - 9,999,999

●Heroic > 100,000 - 999,999