Jace's erasure + Jace, memory adept
Jaces erasure allows opponent to discard 1 card every time you draw a card.
Memory adept, his big ability lets any amount of targets draw 20 cards.
You target yourself and your opponent, you draw 20, so he discards 20 AND he draws his 20 cards. You removed 40 cards from his deck in ome turn, congratulations! ;)
Or 3 Jace's Erasure.
Even worse traumatize the keening stone insta decking