5 adjectives to describe poisoners

Locusta, the celebrated poisoner of ancient Rome, was summoned to the councils of Nero to get rid of Britannicus, as she had already been summoned to those of his mother when she wished to disembarrass herself of Britannicus's father.

My rustic pipe far better loved to sing of melodramatic poisoners and ubiquitous detectives; of fine houses in the West of London, and dark dens in the East.

Pray accept this for a letter, and believe me, with sincere regards, yours, C.L. Wainewright, the notorious poisoner, who, under the name of "Janus Weathercock," contributed various frothy papers on art and literature to the "London Magazine.

It was to them the land of the Borgias and the Cenci; of families of proud nobles, luxurious, cultivated, but full of revenge and ferocious cunning; subtle poisoners, who killed with a perfumed glove or fan; parricides, atheists, committers of unnamable crimes, and inventors of strange and delicate varieties of sin.

They are typical poisoners of the worst kind; of the intelligent, cautious, resourceful kind.

5 adjectives to describe  poisoners