The Witch (2016)
This indie hit delivers everything we never see in horror today. The backdrop, a farm in 17th-century New England, is pure misty, macabre mood. The circumstance, a Puritanical family making it on the fringe of society because they're too religious, bubbles with terror. And the question, whether devil-worshipping is hocus pocus or true black magic, keeps each character on their toes, and begging God for answers. The Witch tests its audience with its (nearly impenetrable) old English dialogue and the (anxiety-inducing) trials of early American life, but the payoff will keep your mind racing, and your face hiding under the covers, for days.