Fain, the Broker, Chatterfang, Squirrel General, Intruder Alarm, and Bloodspore Thrinax

Prerequisites

• Fain, the Broker on the battlefield
• Chatterfang, Squirrel General on the battlefield
• Intruder Alarm on the battlefield
• Bloodspore Thrinax on the battlefield
• Fain does not have summoning sickness
• Bloodspore Thrinax has at least two +1/+1 counters on it

Steps

1. Activate Fain's second ability by tapping it and removing a counter from a creature you control, creating a Treasure artifact token and a 1/1 Squirrel creature token that enters with at least one +1/+1 counter on it due to Bloodspore Thrinax
2. The Squirrel enters the battlefield, triggering Intruder Alarm, untapping all creatures
3. Repeat
4. Once you have infinite Treasure and Squirrel tokens, you may activate Fain's other abilities

Results

• Infinite +1/+1 counters
• Infinite colored mana
• Infinite creature tokens
• Infinite ETB
• Infinite mana creatures you control can produce
• Infinite Treasure tokens
• Infinite untap of all creatures
• Infinite LTB
• Infinite sacrifice triggers
• Infinite death triggers