自分 is not an Entity, but a Quest offered by [The System]
[Quest]: Venture into a 100 Floor Tower, and slay all within it
Failure: Death
Reward Pool upon completion (2 Choices)
Title: "the Conqueror" (B-Rank)
Skill: Heavy Aura (D-Rank)
Unique Skill: Conquerors Essence (B-Rank)
Equipment: Flaming Greatsword (D-Rank)
Equipment Upgrade Token (B-Rank)
Stat: [Magic] Budding Archmage (C-Rank)