Hellboy's epic battle with the immortal warrior Koshchei reaches its climax in the thunderous conclusion to this six-issue arc. The long-awaited follow-up to 2005's The Island, Calls sees Mike Mignola pushing his greatest creation, Hellboy, toward the next major turning point in his life, with haunting art by Duncan Fegredo (Enigma, Ultimate Adventures). The final issue of Darkness Calls written by Mike Mignola.