Kozilek, the Great Distortion is a mythic Legendary Creature — Eldrazi card from Oath of the Gatewatch (OGW), collector number 4. Current market price: $4.89 (foil $15.55), TCGplayer market prices via Scryfall.
When you cast this spell, if you have fewer than seven cards in hand, draw cards equal to the difference. Menace Discard a card with mana value X: Counter target spell with mana value X.