Frozen Essence

Frozen Essence is an in-game item described as a frigid residue produced by a specific experimental subject or device when it is exposed to intense X-ray irradiation. The core descriptive detail shared across all available localizations is that this substance is the cold leftover that remains after the entity designated as IS-0091-B is bathed in high-energy X-rays. The phraseology in each language emphasizes both the extreme cold quality of the residue and the triggering condition of high-energy X-ray exposure.

The item is consistently framed as a residual product rather than a deliberate output: translations characterize it as a remainder, residue, or leftover that appears after the irradiation event. Every localization highlights two linked facts: the host identifier (the numeric-alphanumeric unit) and the irradiation stimulus (high-energy X-rays), with the residue taking on a distinctly frozen or gel-like cold nature.

There is a minor variance among sources in the host identifier string. The majority of localizations use the designation IS-0091-B (English, Spanish, French, Japanese, Portuguese-BR, Russian, Simplified and Traditional Chinese). The German localization records the host as ES-0091-B; this is the sole localization to use that variant. When referring to the item's origin in documentation or inventory text, note that translations differ only in that single character of the designation.

Practical, source-derived points for reference:

• Item type: cold/frigid residue resulting from an irradiation event (described across localizations as a leftover or residue).
• Trigger: exposure or immersion in high-energy X-rays; the residue appears after the IS-0091-B (or ES-0091-B in German) unit is subjected to such radiation.
• Sensory quality: uniformly described as extremely cold, frozen, or gel-like in texture or appearance in each language.
• Naming consistency: English and most other localizations use IS-0091-B; the German localization uniquely uses ES-0091-B. The remainder of the descriptive text is semantically equivalent across languages.

No other properties, uses, or mechanical effects are specified in the provided localizations; the available material restricts the item’s canonical description to its provenance (irradiated IS/ES-0091-B) and its character as a frigid residue left after high-energy X-ray exposure.