S14·E8 Byzantium

Episode recap

Task: Write a 280-380 word episode recap for Supernatural S14E8 (Byzantium).
Constraints:
Use ONLY verifiable facts from the provided SYNOPSIS and SOURCES.
No invented titles, names, dates, counts, awards, ratings, box-office, or plot points.
If a detail is not in the material, omit it.
Write original, neutral, encyclopedic prose in plain text.
No markdown, no asterisks, no headings, no bullet points.
Word count target: 280-380 words.
Synopsis: "When Sam and Dean join forces with an unexpected ally, the outcome will alter the course of two lives. Meanwhile, Heaven faces an attack from a dark force, driving Castiel to make an enormous sacrifice to make things right."
Sources:
[1] TMDB: Series overview (Sam and Dean Winchester).
[2] Wikipedia: Series info (created by Eric Kripke, 15 seasons, Sept 13, 2005 - Nov 19, 2020, Sam played by Jared Padalecki, Dean played by Jensen Ackles).
[3] IMDb: Cast/crew link.
[4] TMDB Cast/Crew: Backstory (lost mother to demonic force, father raised them as soldiers).
[5] Simple Wikipedia: Genre (horror, drama, fantasy, fiction).
Episode Title: Byzantium (S14E8).
Characters mentioned in synopsis: Sam, Dean, Castiel.
Plot point 1: Sam and Dean join forces with an unexpected ally.
Plot point 2: This outcome alters the course of two lives.
Plot point 3: Heaven faces an attack from a dark force.
Plot point 4: Castiel makes an enormous sacrifice to make things right.
The synopsis is extremely brief.
The word count requirement is 280-380 words.
Problem: If I only use the provided facts, I cannot reach 280 words without repeating myself or adding information not in the text.
Constraint Check: "If the synopsis is sparse, stay concise rather than guessing." vs "Write a grounded 280-380 word episode recap".
Conflict: The instructions demand a specific word count (280-380) but also forbid adding any information not in the provided text. The provided text is only about 40 words long.
Strategy: I must expand on the context provided by the sources (the series itself) to reach the word count, while strictly adhering to the synopsis for the