S9·E23 Do You Believe in Miracles?

Episode recap

Task: Write a 280-380 word episode recap for Supernatural S9E23 ("Do You Believe in Miracles?").
Constraint 1: Use ONLY verifiable facts from the provided SYNOPSIS and SOURCES.
Constraint 2: Do not invent/guess titles, names, dates, counts, awards, ratings, etc.
Constraint 3: If a detail is not in the material, omit it.
Constraint 4: Write original, neutral, encyclopedic prose in plain text.
Constraint 5: No markdown, no asterisks, no headings, no bullet points.
Constraint 6: Word count target: 280-380 words.
Synopsis: After attacking Gadreel, Dean leaves with Crowley to track down Metatron and kill him. Meanwhile, Gadreel takes Castiel into Heaven to try and break Metatron's connection to the angel tablet.
Sources:
[1] TMDB: Series title Supernatural (2005).
[2] Wikipedia: Created by Eric Kripke. Broadcast on The WB and The CW for 15 seasons (Sept 13, 2005, to Nov 19, 2020). Follows brothers Sam (Jared Padalecki) and Dean (Jensen Ackles).
[3] IMDb: Cast/crew info.
[4] TMDB: Sam and Dean Winchester lost their mother to a demonic force; father raised them to be soldiers to kill paranormal evil.
[5] Simple English Wikipedia: Horror, drama, fantasy, fiction series. Created by Eric Kripke.
Episode: S9E23 "Do You Believe in Miracles?".
Plot: Dean attacks Gadreel. Dean leaves with Crowley to find and kill Metatron. Gadreel takes Castiel to Heaven. Goal: Break Metatron's connection to the angel tablet.
Context: Supernatural is an American dark fantasy, horror, drama, and sci-fi series created by Eric Kripke. It follows brothers Sam Winchester, played by Jared Padalecki, and Dean Winchester, played by Jensen Ackles.
The synopsis is extremely brief.
The sources provide general series info but very little specific episode info beyond the synopsis.
Problem: The user wants a 280-380 word recap. The provided synopsis is only about 40 words.
Constraint Check: "If the synopsis is sparse, stay concise rather than guessing." AND "Write a grounded 280-380 word episode recap".
Conflict: I cannot meet the 280-380 word count without inventing facts, which is strictly forbidden by the prompt ("You never invent or guess...