S7·E23 Survival of the Fittest

Episode recap

Task: Write a 280-380 word episode recap for Supernatural S7E23 (Survival of the Fittest).
Constraints:
Use ONLY verifiable facts from the provided SYNOPSIS and SOURCES.
No invented titles, names, dates, counts, awards, ratings, numbers, or plot points.
If a detail is not in the material, omit it.
Original, neutral, encyclopedic prose.
Plain text only (no markdown, no asterisks, no headings, no bullet points).
Word count: 280-380 words.
Synopsis: Dean and Sam prepare for battle with Dick Roman, who is in the final phase of his plan. The Winchesters must team up with Castiel, Bobby, Meg, and Kevin in order to stop him.
Sources:
[1] General info: Supernatural (2005), TV-14, Drama, Mystery, Sci-Fi & Fantasy.
[3] Broadcast: The WB and later The CW, 15 seasons, Sept 13, 2005, to Nov 19, 2020.
[4] Background: Sam and Dean Winchester lost their mother to a mysterious and demonic supernatural force.
[5] Creator: Eric Kripke.
The synopsis is extremely sparse. It only mentions:
Characters: Dean, Sam, Dick Roman, Castiel, Bobby, Meg, Kevin.
Plot: Dean and Sam prepare for battle with Dick Roman. Dick Roman is in the final phase of his plan. The Winchesters must team up with Castiel, Bobby, Meg, and Kevin to stop him.
The sources provide:
Series name: Supernatural.
Series creator: Eric Kripke.
Series history: Aired on The WB and The CW, 15 seasons, 2005-2020.
Background: Sam and Dean Winchester lost their mother to a mysterious and demonic supernatural force.
The user wants a 280-380 word recap.
The provided synopsis only contains about 40 words of actual plot information.
If I strictly follow "Write ONLY verifiable facts that are explicitly supported by the provided SYNOPSIS and SOURCES" and "If the synopsis is sparse, stay concise rather than guessing," I cannot reach 280 words without inventing information.
However, the prompt also says "Write a grounded 280-380 word episode recap".
This is a conflict. If I write only what is provided, I will fail the word count. If I meet the word count, I will violate the "never