I think this is the song in that ninja sword tweet by the UK Home Office

🚨 Ninja swords are used by criminals to rob victims of their lives.

There is only one course of action:

✅ Remove knives from the streets
✅ Tougher consequences for criminals
✅ Save lives pic.twitter.com/VaKMe2qRCK

— Home Office (@ukhomeoffice) September 9, 2024

Reaper by Bryant Lowry, who I believe also composed the soundtrack for John Romero's Sigil II