Imagine From Dusk till Dawn in Spanish … and with witches rather than vampires… and you have some sense of this horror mash-up. It manages to ride the line of dark humor and midnight horror well, never quite flying off the rails of the genre it has embraced. And within that boundary it succeeds. That is a credit to director/co-writer Álex de la Iglesia (Oxford Murders). A more general assessment of it would be considerably less kind, but it isn’t pretending to swim in the big pool.
The acting is, by design, broad and unrealistic. This allows for a considerable amount of slapstick humor as well as situational. Eventually it provides the bedrock for the insanity that is the final act. Though full of well-awarded actors, only Javier Botet (Mama) had hit my radar before, and he is more often than not loaded down with heavy make-up so you could be forgiven for not recognizing him in this or previous roles.
Witching is a movie for popcorn lovers of horror. But, be warned, the subtitling is rapid fire. If your Spanish is strong, no problem. If it is weak or non-existent, prepare for a marathon. The movie is also full of splatter and intentional grotesqueries. It is a fun run, but not a brilliant one. It does really try to have complete throughlines, motivations, and plot at least. Sit down expecting nothing more than entertainment and you’ll likely have enough fun to make it worth your time.