Doomsday Excruciator + Phenax, God of Deception

Doomsday Excruciator

Phenax, God of Deception

How it works

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. Activate a creature you control by tapping it, causing an opponent to mill cards equal to the creature's toughness.
4. Repeat step 3 as desired and/or able.