Braids, Arisen Nightmare is a rare Legendary Creature — Nightmare card from The List (PLST), collector number DMU-84.
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.