Number 31 in the Hellboy series.

Hellboy's struggle with Koshchei continues as Gruagach and the witches draw closer to their sinister quarry. The long-awaited follow-up to 2005's The Island, the six-issue Darkness 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). Hellboy vs. Koshchei the Deathless!