Zellix, Sanity Flayer + Haunted One + Pith Driller + Ashnod's Altar + Intruder Alarm

Prerequisites

• Zellix does not have summoning sickness.
• Pith Driller does not have a +1/+1 counter on it.

Steps

1. 1Activate Zellix by paying and tapping it.
2. 2Haunted One triggers, causing all Horrors you control to get +2/+0 and undying until end of turn.
3. 3Resolve the Zellix ability, causing a player to mill three cards.
4. 4If the player milled a creature card this way, Zellix triggers, creating a 1/1 Horror creature token.
5. 5Activate Ashnod's Altar by sacrificing Pith Driller, adding .
6. 6When Pith Driller dies, its undying ability triggers, returning it from your graveyard to the battlefield with a +1/+1 counter on it.
7. 7When Pith Driller enters the battlefield, it and Intruder Alarm trigger.
8. 8Resolve the Pith Driller trigger, putting a -1/-1 counter on it.
9. 9Resolve the Intruder Alarm trigger, untapping all creatures.
10. 10Repeat.

Effects

• Infinite colorless mana
• Infinite creature ETB
• Infinite creature LTB
• Infinite creature sacrifice triggers
• Infinite death triggers
• Infinite mana creatures you control can produce
• Infinite mill
• Infinite power for certain creatures until end of turn
• Infinite self-mill
• Infinite untap of creatures
• Near-infinite colorless mana
• Near-infinite creature LTB
• Near-infinite creature sacrifice triggers
• Near-infinite creature tokens
• Near-infinite death triggers