Sigarda's Imprisonment is a common Enchantment — Aura card from Innistrad: Crimson Vow (VOW), collector number 35. Current market price: $0.18 (foil $0.23), TCGplayer market prices via Scryfall.
Enchant creature Enchanted creature can't attack or block. {4}{W}: Exile enchanted creature. Create a Blood token. (It's an artifact with "{1}, {T}, Discard a card, Sacrifice this token: Draw a card.")