A Container of Booster Packs is a common Artifact card from Unknown Event (UNK), collector number CA02.
{1}, {T}, Exile this artifact: You may reveal a container holding at least three different sealed booster packs. If you do, select one of those packs at random, open it, and put a card from it into your hand. (You're responsible for providing the booster packs and the container. Other cards from the opened pack remain out of the game.)