Wan Shi Tong, All-Knowing, Library of Leng, Intruder Alarm, and Arcade Gannon

Prerequisites

• Wan Shi Tong, All-Knowing on the battlefield
• Library of Leng on the battlefield
• Intruder Alarm on the battlefield
• Arcade Gannon on the battlefield

Steps

1. Activate Arcade Gannon by tapping it, causing you to loot
2. The discarded card will be put on top of your library instead of into your graveyard due to Library of Leng
3. Wan Shi Tong's second ability triggers, creating two 1/1 Spirit creature tokens
4. When the Spirits enter, Intruder Alarm triggers twice, untapping all creatures twice
5. Repeat

Results

• Infinite ETB
• Infinite creature tokens
• Infinite self-discard triggers
• Infinite draw triggers
• Infinite mana creatures you control can produce
• Infinite untap of all creatures