Memory Jar [Urza's Legacy] Core Set 2019 Prerelease Promos put those cards onto the

put those cards onto the battlefield tapped

counter it unless that player pays {3}

This one just gets you

specific to Ravnica

Set: Commander Anthology Volume II Type: Creature — Homunculus Rarity: Rare Cost: {2}{U} Whenever a creature attacks you or a planeswalker you control

Memory Jar [Urza's Legacy] Core Set 2019 Prerelease Promos put those cards onto theSet: Urza's Legacy Type: Artifact Rarity: Rare Cost: {5} {T}, Sacrifice Memory Jar: 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.