Phenax, God of Deception + Undead Alchemist + Intruder Alarm

Prerequisites

• At least one creature you control does not have summoning sickness.
• NOTE: This combo can only persist as long as a creature card is milled with each iteration; as such, the more creatures you can tap, the lower your chances of failure.

Steps

1. 1Activate all creatures you control by tapping them.
2. 2Resolve the first creature's ability, causing target opponent to mill cards equal to the creature's toughness.
3. 3For each creature card milled this way, Undead Alchemist triggers, exiling that card and causing you to create a 2/2 Zombie creature token.
4. 4If a Zombie is created, it enters the battlefield, triggering Intruder Alarm, untapping all creatures.
5. 5Repeat from step 2 for each remaining trigger.
6. 6Repeat from step 1.

Effects

• Infinite mill
• Near-infinite creature tokens
• Near-infinite ETB
• Near-infinite untap of all creatures