Hellboy: The Board Game – End of Days

This expansion is the weaker one from the Box of Doom. It only comes with 4 playable character and their cards, plus a couple of case files. Besides that, 2 of the characters are just different versions of old ones. No new enemies, no cards for the case file construction system, no new tokens, no new tiles. I'd skip it if it was sold separately (nowadays it is sold only as part of the Box of Doom). Anyway, it's "more Hellboy", so it at least adds a tiny fraction of variability to the game.