Memory Jar is a rare Artifact card from Urza's Legacy (ULG), collector number 129. Current market price: $37.29 (foil $334.52), TCGplayer market prices via Scryfall.
{T}, Sacrifice this artifact: Each player exiles all cards from their hand face down and draws seven cards. At the beginning of the next end step, each player discards their hand and returns to their hand each card they exiled this way.