From GameWatcher: “Succubus is the title of the upcoming spin-off to Agony, a first-person horror adventure game that takes you on a literal walk through hell. Its latest teaser trailer presents the Cherub, an all-new enemy type that will be prominently featured in Succubus.
Good folk from Madmind Studio have gone and added the Cherub to Agony as well in a free update for the game. If you play Agony now, you will come across Cherubs every once in a while, which is sure to provide a different gameplay experience in some levels.”
Source: N4G PC Agony spin-off Succubus presents the Cherub in New Trailer