What idioms are there to describe sinister things?

Take risks: Take risks of exploiting vulnerabilities. Alas, it means (the mountain) is dangerous and steep.

Sword forest: a metaphor for a sinister situation.

Wind and waves: a metaphor for sinister encounters or severe tests.

The wind and rain are gloomy; Xiao; Cold and lifeless; Hey: dim. Describe the sudden storm, the sky is dark. It is also a metaphor for the sinister situation.

There are scales on the abdomen: scales: a metaphor for a sly heart. Metaphor is sinister and inaccessible.

Belly scale: scale: a metaphor for a sly heart. Metaphor is sinister.

Dogs hate wine and sour wine: a metaphor for the sinister environment that makes people hold back.