Distended Mindbender is a rare Creature — Eldrazi Insect card from Eldritch Moon (EMN), collector number 3. Current market price: $0.17 (foil $0.28), TCGplayer market prices via Scryfall.
Emerge {5}{B}{B} (You may cast this spell by sacrificing a creature and paying the emerge cost reduced by that creature's mana value.) When you cast this spell, target opponent reveals their hand. You choose from it a nonland card with mana value 3 or less and a card with mana value 4 or greater. That player discards those cards.