Braids, Arisen Nightmare is a rare Legendary Creature — Nightmare card from Game Day Promos (GDY), collector number 8. Current market price: — (foil $29.46), TCGplayer market prices via Scryfall.
At the beginning of your end step, you may sacrifice an artifact, creature, enchantment, land, or planeswalker. If you do, each opponent may sacrifice a permanent of their choice that shares a card type with it. For each opponent who doesn't, that player loses 2 life and you draw a card.