My Beast World System

Caden transmigrates. Forced into marriage by Ursa, System requires rejecting Ursa. Caden rejects Ursa, chooses fox-girl Faye. Thrown into Valley of Death, Caden uses System/modern knowledge to thrive, builds tribe, gathers harem. Outwits Ursa, takes Black Bear Tribe. Expands territory, forms Black Bear Alliance. Lion Clan wars. Caden uses gunpowder/firearms, defeats King Leo. Unifies continent, establishes Citadel, becomes king, enjoys wives.