Trudge Garden, Intruder Alarm, and Verdant Sun's Avatar

Prerequisites

• Trudge Garden on the battlefield
• Intruder Alarm on the battlefield
• Verdant Sun's Avatar on the battlefield
• Creatures you control can tap to produce at least
• You have a way to gain life

Steps

1. Gain any amount of life
2. Trudge Garden triggers, holding priority, activate all mana-producing creatures you control by tapping them, adding at least
3. Resolve the Trudge Garden trigger, causing you to pay to create a 4/4 Fungus Beast creature token
4. The Fungus Beast enters the battlefield, triggering Verdant Sun's Avatar and Intruder Alarm
5. Resolve the Intruder Alarm trigger, untapping all creatures
6. Resolve the Verdant Sun's Avatar trigger, causing you to gain life equal to the Fungus Beast's toughness
7. Repeat from step 2

Results

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