Estark

Estark is a prominent villain in the Dragon Quest series of videogames. It's a giant, horned, three-eyed insectoid creature that wields a pair of swords. Known as the dormant Lord of the Underworld, he has a reputation of being one of the strongest monsters in the franchise.

Appearances
He made his debut in Dragon Quest IV as a boss and later appeared in other games, namely Dragon Quest V as a superboss, Dragon Quest IX as one of the many legacy bosses and a recruitable and synthesizable monster in the Dragon Quest Monsters spin-off games (using a Psaro and a Marquis de Léon ). He's blue in Dragon Quest IV and then brown in its other game incarnations. A monster similar to Estark appears in an update of Dragon Quest X, it's still unkown if it's him.