Memory Vessel is a mythic Artifact card from The Big Score (BIG), collector number 43. Current market price: $1.44 (foil $2.47), TCGplayer market prices via Scryfall.
{T}, Exile this artifact: Each player exiles the top seven cards of their library. Until your next turn, players may play cards they exiled this way, and they can't play cards from their hand. Activate only as a sorcery.