Koshchei the Deathless

In this 2018 Dark Horse one-shot, Mike Mignola expands his Hellboy universe by exploring the tragic, centuries-spanning origin of the immortal warrior Koshchei the Deathless. The story delves into the character's mythic Russian folklore roots, revealing the curse and bargains that shaped his unkillable nature. Mignola's signature gothic art and moody storytelling make this a haunting, essential chapter for fans of the broader Mignolaverse.