Zmey Gorynych
The three-headed fire-dragon of the byliny, whose severed heads regrow unless the strike is true.
In the Russian heroic songs, Zmey Gorynych — 'of the mountains' — flies on storm-wings with three (or nine) fire-breathing heads, abducting the innocent and demanding tribute, fought by bogatyrs like Dobrynya Nikitich. His signature trait joins him to the Hydra: heads struck carelessly regrow. The byliny add a Slavic subtlety — the hero's decisive weapon is often not the sword but endurance and the earth itself, which lends the bogatyr strength when he is nearly beaten. The shadow multiplies under crude attack and yields to the fighter who stays rooted.
The SGE Reading
Shadow's multiplication law, eastern edition: rootedness, not blade-speed, decides the battle with what regrows.
Canon Resonance
For every recurring symptom in the series: strike from the ground, or don't strike.
A Micro-Practice
When an old pattern regrows, skip the counterattack once. Ground first — feet, breath, earth — then respond.
Sources & Respect
Russian byliny (Dobrynya and the Zmey).