Sin, Unending Cataclysm, Intruder Alarm, Phyrexian Altar, and Selvala, Heart of the Wilds

Prerequisites

• Sin, Unending Cataclysm in hand or in the command zone
• Intruder Alarm on the battlefield
• Phyrexian Altar on the battlefield
• Selvala, Heart of the Wilds on the battlefield
• plus commander tax if applicable available

Steps

1. Cast Sin either from your hand or command zone by paying plus commander tax if applicable
2. As Sin enters, remove all counters from all artifacts, enchantments and creatures you control, putting twice that many +1/+1 counters on Sin
3. When Sin enters, Intruder Alarm triggers, untapping all creatures
4. Activate Selvala by paying and tapping it, adding at least plus an additional equal to Sin's power minus 3
5. Activate Phyrexian Altar by sacrificing Sin, adding
6. Choose to return Sin to the command zone from your graveyard
7. When Sin dies, it triggers, putting its counters on Selvala
8. Repeat

Results

• Infinite LTB
• Infinite ETB
• Infinite colored mana
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite storm count
• Infinite mana creatures you control can produce
• Infinite untap of creatures
• Infinite commander casts
• Infinite +1/+1 counters on a creature