bagiennik

plural bagienniks

1. A Slavic monster or demon that lives in lakes or rivers, which produces a hot liquid from its nostrils that can burn victims, but which also has healing powers.

   There's a Bagiennik or two sleeping under the ice in the lake.

   2020, Uncanny Magazine Issue 36, page 126

   2 more examples

   The bagiennik's black teeth shone with water. He slid nearer, moving like a water-snake.

   2020, Katherine Arden, The Winter of the Witch

   The Goblin Court would not stand by and allow such an invasion. Doubtless it would include filthy rusalki and bagiennik, and lowly peasant magic. We would consider that an act of war.

   2021, P. Djèlí Clark, A Master of Djinn