Leviathan and KV 44

Leviathan itself is powerful, having already claimed the lives of Alpha, Tsar Tank, and many others, and was also able to capture several worlds (its own, "Oil" under Gesarius), most of the Soviet Union almost to the Volga and on the approaches to Kuibyshev (Samara), and the territories of other countries (for example, France was completely captured). Its weak point is its horns. It has many abilities: acceleration, super-shot, portals, regeneration, resurrection, and demonization (transforming someone into a demon). The Lord of Hell, the one who turned a prosperous dimension into a terrible place and deprived the Fallen Angels of their home. Ruthless and cold-blooded towards everyone, even his own son (mini-series - Leviathan vs. Son). Cunning and intelligent, it rarely engages in battle itself and usually sends a minion (in extreme cases, Dora) to destroy the enemy. KV-44 (also known as the First KV-44, full name Klim Voroshilov 44) - A super-heavy, multi-turreted monster of the Soviet Union, a symbol of resistance to Leviathan. A three-time Hero of the USSR, he was one of the first to defeat Leviathan.