Intruder Alarm, Tempting Licid, Phyrexian Altar, Siona, Captain of the Pyleas, and Doubling Season

Prerequisites

• Intruder Alarm on the battlefield
• Tempting Licid on the battlefield
• Phyrexian Altar on the battlefield
• Siona, Captain of the Pyleas on the battlefield
• Doubling Season on the battlefield
• Tempting Licid does not have summoning sickness
• available

Steps

1. Activate Tempting Licid by tapping it and paying , attaching it to Siona
2. Siona triggers, creating two Human Soldier creature tokens
3. Intruder Alarm triggers twice
4. Activate Phyrexian Altar twice by sacrificing a Human Soldier creature token, adding each time
5. Pay to end Tempting Licid's effect, making it a creture once more
6. Resolve both Intruder Alarm triggers, untapping all creatures
7. Repeat

Results

• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers