Sforno on Deuteronomy 12:23/ספורנו על דברים י״ב:כ״ג

1רק חזק לבלתי אכול הדם, even though you hope that by eating the blood you will be able to divine the future as do the demons as our sages said in Chagigah 16 that upon eating blood one can hear the future in the same manner as do the ministering angels.” [On that folio the Talmud does not describe the demons as eating blood, specifically; also the Talmud describes the knowledge of the demons of future events as not based on their intelligence, but as something they overheard in the celestial regions. Nachmanides elaborates on all this, particularly in his commentary on the relevant verse in Acharey Mot. Ed.]