Kremlin is a new Slavic city.

He could have been the seventh, with a chain lightning spell =)))

A god as a regular unit? So, Veles will be running around the battlefield? :D
And the enemies will be shouting, "Our Veles are cooler!" :D

- I suggest simply changing "Baba Yaga" to "Yaga" - it sounds more stylish.

Yaga? Too short.
Maybe I'm mistaken, but it seems that the British also had the god Veles :), but that's a different story...