Consecrated Sphinx and The Beamtown Bullies on the battlefield.
Steps
During that opponent's draw step, they draw a card.
Consecrated Sphinx triggers, holding priority, activate The Beamtown Bullies by tapping it, causing the opponent to put Notion Thief from your graveyard onto the battlefield under their control.
Resolve the Consecrated Sphinx trigger, causing the opponent to draw two cards due to Notion Thief.
Consecrated Sphinx triggers twice.
Resolve the first trigger, causing the opponent to draw two cards due to Notion Thief.
Repeat from step 4 until the opponent loses the game due to drawing from an empty library.