Here is a concise summary of the SCP-407 story:
**Incident Summary:**
* A panicked landlady reported a bizarre incident in one of her tenant's rooms, which was found to be overgrown with anomalous flora and fauna.
* The tenant, a university professor, was missing, with only a human skull consumed by anomalous mold left behind.
* Investigation led to an unmarked cassette tape, dubbed SCP-407, which contained a 28-minute song in an unknown language.
* **Effects of SCP-407:**
+ Initial (0-1min): Accelerates cell growth, curing physical maladies (except cancer).
+ Prolonged (2-5min+): Unchecked cell growth, leading to benign tumors, then catastrophic ecological overgrowth, and ultimately, a deadly, dimension-hopping fungal infestation.
* **Containment and Neutralization:**
+ The SCP Foundation contained the anomaly, but a member of The Serpent's Hand (L.S.), with knowledge of a dimension where SCP-407 caused an XK-Class Scenario, hacked into the database and deleted all records, effectively neutralizing the threat.
**Key Takeaway:** SCP-407, a mysterious song, poses an existential risk due to its catastrophic ecological effects, leading an unlikely ally to neutralize the threat by erasing its records.
Here are the extracted key facts, numbered and in short sentences, excluding opinions:
**Incident and Discovery**
1. A panicked landlady called the police about a horrific incident in one of her downtown tenement building's rooms.
2. The room belonged to a university professor who had recently returned from an Amazon rainforest expedition.
3. Police found the room filled with trees, plants, fungi, insects, and animals, teeming with life.
4. A human skull was discovered sinking into anomalous mold on the wall with tendrils emerging from the eye sockets.
**SCP-407 (The Cassette Tape)**
5. The SCP Foundation took over the situation and discovered an unmarked cassette tape in the room, later known as SCP-407.
6. SCP-407 is a 28-minute recording of a song in an unknown language, sung acapella by unknown individuals.
7. The cassette tape was backed up as an audio file in the Site 19 Computer Database due to degradation concerns.
**Effects of SCP-407**
8. Listening to the song for ≤1 minute accelerates cell growth, curing most physical maladies (except cancer).
9. Listening for 2-3 minutes causes unnecessary cell growth, leading to benign tumors and skin growths.
10. After 4 minutes, single-celled organisms in the vicinity experience accelerated mitosis, leading to dangerous bacterial and fungal growth.
11. Beyond 5 minutes, the effects become catastrophic, with rapid ecosystem growth and transformation.
**Testing and Consequences**
12. Two tests were conducted with D-Class personnel, both resulting in the subjects' deaths and the growth of anomalous ecosystems.
13. A parasitic fungus, similar to Cordyceps Fungi but more evolved, appeared in both tests, consuming everything.
**Connection to Other SCPs and Dimensions**
14. The fungus is linked to a dimension encountered by SCP-507, a man with dimension-hopping abilities.
15. In this dimension, SCP-507 found an abandoned Site 19 covered in the same mold, with the entire world consumed by it.
**Neutralization**
16. Person of Interest L.S. (a group of Alison Chao from multiple dimensions) breached Site 19 and deleted all records of SCP-407.
17. L.S. left a note stating "You'll thank me for deleting what you call '407'".