Related Clues:
- Warning! Cockney's in north
- Four-leaf clover, to some
- Thunderclap, to the superstitious
- Ill sign, say
- Fodder for soothsayers
- Black cat, e.g., to some
- Old guys giving sign
- Occult sign
- Wolf howls, maybe
- Blood moon, to some
- Frightening signs
- 'Good ___' (show that, despite online petitions, is not on Netflix)
- Warning of mass extinction, now all kicking off
- Harrowing harbinger
- Eclipse, to the superstitious