Felhide Spiritbinder, Intruder Alarm, Burning-Tree Emissary, and Viridian Longbow

Prerequisites

• Felhide Spiritbinder on the battlefield
• Intruder Alarm on the battlefield
• Burning-Tree Emissary in hand
• Viridian Longbow on the battlefield
• Viridian Longbow attached to Felhide Spiritbinder
• Felhide Spiritbinder does not have summoning sickness
• available

Steps

1. Activate Felhide Spiritbinder by tapping it, dealing 1 damage to any target
2. Cast Burning-Tree Emissary by paying
3. Burning-Tree Emissary enters the battlefield, triggering itself and Intruder Alarm
4. Resolve the Burning-Tree Emissary trigger, adding
5. Resolve the Intruder Alarm trigger, untapping all creatures
6. Felhide Spiritbinder triggers, holding priority, activate it by tapping it, dealing 1 damage to any target
7. Resolve the Felhide Spiritbinder trigger, causing you to pay to create a token copy of Burning-Tree Emissary with haste
8. Repeat from step 3

Results

• Infinite creature tokens
• Infinite damage
• Infinite ETB
• Infinite mana creatures you control can produce
• Infinite untap of all creatures