Baba Yaga was from an earth where superpowers were a few and distributed among the global powers, being she the meta agent from Russia.
She, along with her allies, were killed by a parallel version Peter Cannon, Thunderbolt, who had reached godlike powers. Depiste being cold, Baba Yaga showed real determination and bravery, even when the defeat was evident.
Baba Yaga is an analog to Silk Spectre/Nightshade. At difference of Silk Spectre, Baba Yaga had real magical powers.