Beast of Reincarnation Ursa: The Chapter 10 Nushi, Corroborated
A bear at the end of Chapter 10, at Lv. 46 — the one Nushi whose name and animal are confirmed by a source that played the game and had never seen the internal id we derived it from.
The internal achievement id for this fight is ACH_NUSHI_KUMA, which names bear — 熊 (kuma). Placed by the sync script with no judgement involved: this id's unlock percentage is currently unique across both Steam endpoints. Kuma is a bear, Ursa is the bear.
Clear order
5 of 7
Corroborated by two unrelated sources
Owners who have cleared it
2.6%
Valve’s live figure, re-read daily
How the name was established
confirmed
Independently corroborated

How well we know this fight
Where the evidence stands
The most interesting evidential case in the roster, and the reason it gets a page while three of its siblings do not. We derived "Ursa" from an internal achievement id naming a bear, using a rule — the id names the animal, the display name is that animal’s Latin genus. That is our reasoning, and reasoning alone is the weakest grade here. Then an outside writer who had played the game described Ursa as the Nushi capping Chapter 10, "a hulking bear", at Lv. 46. They had no access to the internal id. Two methods with nothing in common landing on the same animal in the same slot is the corroboration; neither half would have been publishable alone.
What is actually established
Three things, and they are worth separating from each other. The achievement id names a bear — that is first-party, from the shipped game’s own manifest. The display name Ursa pairs to it on the Latin-genus rule, which is our inference. And an independent writer places that same bear at the end of Chapter 10 at Lv. 46. The chapter and the level are theirs, not ours, and are the only numbers on this page.
What nobody has filmed
The fight. There is no commentated recording of this encounter anywhere we have looked, which means this page can tell you where in the run it sits, what it is, and how confident each part of that is — and cannot tell you how to beat it. That gap is the honest state of the evidence rather than an omission, and it is the reason this page is short. A page that filled the space with plausible tactics would be indistinguishable from the cluster sites that invented an entire boss roster for this game.
Ursa — questions players actually ask
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