Cruel Reality is a mythic Enchantment — Aura Curse card from Amonkhet (AKH), collector number 84. Current market price: $2.80 (foil $2.55), TCGplayer market prices via Scryfall.
Enchant player At the beginning of enchanted player's upkeep, that player sacrifices a creature or planeswalker of their choice. If the player can't, they lose 5 life.