I like this one - it takes us on a grotesque and absurd trip, drags us in a dark tale and into the void of growing madness. Michelle Monaghan gives a fine and emotional performance, the rest of the cast, including the kids, does also well. Different than some other reviewers I don't mind that the "reason" for the dark and twisted happenings is not revealed - make up your mind yourself, the experienced connoisseur of the art of horror (be it books or movies) can easy fill the blanks. What else? Blood reminds me of Hereditary or The Witch, movies that takes us along on a dark, disturbing path, where in the end something awaits us that we don't expect.