Magus of the Jar is a rare Creature — Human Wizard card from Time Spiral (TSP), collector number 67. Current market price: $1.27 (foil $4.19), TCGplayer market prices via Scryfall.
{T}, Sacrifice this creature: 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.