the new Crow Hag have "Death Omen : Choose 1 hero in this monster's line of sight. That hero may choose to suffer 2 heart. If he does not, he suffers 1 condition of your choice".

Baron zachareth have " Subdue : If this attack deals at least 1 heart, choose 1 condition. The target suffers from the chosen condition

Rylan olliven Subdue : If this attack deals at least 1 heart, choose 1 condition. The target suffers from the chosen condition.

Omen of blight Relic surge: If this attack deals at least one heart (after the defense roll), choose one condition. The target suffers the chosen condition.

any one knows if the overlord have more ways to pick and choose condition, Overlord cards/monsters/Lieutenants/Plot decks/relics

I know the heroes can, with "Runic Sorcery."

"I am the Law" from Marshal's class can also inflict a condition of your choice.

"Crippling Curse" from Hexer's class can also inflict condition of your choice.

"Web of Deception" from Tangled Web (Queen Ariad's plot deck) may substitute a condition been inflicted to a hero to another of your choice.

These and the one mentioned aboved are all the ways to inflict conditions freely. I will try remembering other ways.