The phrase "a wicked act" is correct and usable in written English.
It can be used to describe an immoral or evil deed, often in a literary or dramatic context.
Example: "The villain's plan was to commit a wicked act that would bring chaos to the peaceful town."
Alternatives: "an evil deed" or "a malevolent action".
Maybe it's that Gyges is successful in his plot: a wicked act not only goes unpunished, but is rewarded.
On the way we stop to inspect a solitary bunch of flowers, its Cellophane wrapping tied to a wrought-iron railing, a withering memorial to a wicked act.
President Goodluck Jonathan, who was inspecting a guard of honour at the time, called it a "wicked act of desperation by criminals and murderers".
The mass hysterectomies by private clinics in Dausa is a wicked act, but such malpractice is happening in other areas as well.
The Pope has already annoyed the Turks by calling this wicked act – the most terrible massacre of the First World War – a genocide, which it was: the deliberate and planned attempt to liquidate a race of people.
A native of the region, he quickly sought to separate long-festering grievances there from what he called "the wicked act of desperation by criminals" on Friday.
Sean Mercer has committed the most brutal and wicked act in killing Rhys Jones and it's right he should be punished.
More importantly, despite few specific details about the gunman's motives, it would be remiss not to consider this wicked act of violence as one of racial hate and terrorism.
"More importantly, despite any confirmation of the gunman's motives, it would be remiss to not consider this wicked act of violence as one of racial hate and terrorism.
She ticks off a list of wicked acts she blames on her antagonist in an ancient rivalry, the prime minister, Sheikh Hasina.
But something had happened and that was that the idealism and humanity of very young people was harnessed by social media to condemn the wicked acts of a forgotten warlord.
