Probably a dumb question, but what is SCP? What does it mean the threats are back?
1) SCP is a collaborative writing project by several hundred/thousand authors. It is international and involves the paranormal, contained by the SCP (Secure, Contain, Protect) Foundation. There are Groups Of Interests (GOIs) and jokes too!
A few anomalies i recommend reading are 106 (the Old Man), 096 (Shy Guy), 049 (Plague Doctor), 035 (Possessive Mask), 682 (Hard-To-Destroy Reptile), 999 (Tickle Monster) and 173 (The Sculpture. Also the very first SCP!)
2) Threatsverse is a group of blogs that do ominous threats based on a theme (e.g my SCP Threats being based on SCPs). The original is @the-real-list-of-ominous-threats i believe, and there's 30+ ( @the-list-of-list-of-ominous-threats i believe).
3) I used to be @the-scp-list-of-ominous-threats but my account got hacked so i got this one, meaning I am "back" because i can't access the original.