In The Sandman: Fables and Reflections, Koschei's emerald heart (or, more likely a piece of green glass being passed off as such) passes into the possession of a Romani trader, then a werewolf, and finally Baba Yaga.
It is a punk version of a famous Russian fairy tale with the name of the evil protagonist taken as its title.
Koschei |
The United States' countermeasures for Koschei include 300 megatons of nuclear weapons and a continuity of government base hundreds of light years from Earth.
At that moment Vasilisa, appearing at the cottage's door, subdues Koschei with light from the skull she received from Baba Yaga in her legend.