Xavier Sal, Infested Captain, Intruder Alarm, Ob Nixilis, the Fallen, and Jyoti, Moag Ancient

Prerequisites

• Xavier Sal, Infested Captain on the battlefield
• Intruder Alarm on the battlefield
• Ob Nixilis, the Fallen on the battlefield
• Jyoti, Moag Ancient in hand
• You control at least one Forest Dryad token
• Xavier Sal does not have summoning sickness
• There is a removable counter on a permanent you control

Steps

1. Activate Xavier Sal by tapping it and removing a counter from a permanent you control, creating a token copy of the Forest Dryad token
2. When the Forest Dryad enters the battlefield, Intruder Alarm and Ob Nixilis trigger
3. Resolve the Ob Nixilis trigger, causing an opponent to lose 3 life and putting three +1/+1 counters on it
4. Resolve the Intruder Alarm trigger, untapping all creatures
5. Repeat

Results

• Infinite ETB
• Infinite creature tokens
• Infinite untap of all creatures
• Infinite mana creatures you control can produce
• Infinite Forest tokens
• Infinite landfall triggers
• Infinite lifeloss
• Infinite +1/+1 counters on Ob Nixilis