Doomsday Excruciator, and Breach the Multiverse

Prerequisites

• Doomsday Excruciator in hand
• Breach the Multiverse in hand
• You control at least one creature that does not have summoning sickness
• plus eight available

Steps

1. Cast Doomsday Excruciator by paying
2. When Doomsday Excruciator enters the battlefield, it triggers, exiling all but the bottom six cards of each library face down
3. Cast Breach the Multiverse by paying , causing each player to mill ten cards, thus milling the remainder of each player's library
4. When your opponents go to draw a card during their next draw steps, they will lose the game due to attempting to draw from an empty library

Results

• Infinite mill
• Infinite self-mill