Doomsday Excruciator + Breach the Multiverse
Produces: Infinite mill, Infinite self-mill


- Color identity
- B
- Mana
- {5} plus eight {B}
Prerequisites
You control at least one creature that does not have summoning sickness.
Steps
- Cast Doomsday Excruciator by paying {B}{B}{B}{B}{B}{B}.
- When Doomsday Excruciator enters the battlefield, it triggers, exiling all but the bottom six cards of each library face down.
- Cast Breach the Multiverse by paying {5}{B}{B}, causing each player to mill ten cards, thus milling the remainder of each player's library.
- 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.
How to execute this combo
The "Doomsday Excruciator + Breach the Multiverse" combo takes 4 steps in order. Make sure you have the mana open and permanents listed in the prerequisites before you start — opponents can respond between steps.
The end result: Infinite mill, Infinite self-mill.
Practice the line offline: lay out the cards, walk through each step, and note where you can lose the combo (summoning sickness, lack of priority, removal on a key permanent). In game, announce each step clearly; in casual play you can offer to shortcut after demonstrating the loop.
The best window is a turn when opponents are tapped out or after they commit a spell — hold protection (a counter, Vexing Shusher) if the combo wins on the spot.