Trudge Garden, Teething Wurmlet, Encroaching Mycosynth, and Ashnod's Altar

Prerequisites

• Trudge Garden on the battlefield
• Teething Wurmlet on the battlefield
• Encroaching Mycosynth on the battlefield
• Ashnod's Altar on the battlefield
• You have a way to gain any amount of life
• available

Steps

1. Gain any amount of life
2. Trudge Garden triggers, causing you to pay to create a 4/4 Fungus Beast creature token that is also an artifact due to Encroaching Mycosynth
3. The Fungus Beast enters the battlefield, triggering Teething Wurmlet
4. Holding priority, activate Ashnod's Altar by sacrificing the Fungus Beast, adding
5. Resolve the Teething Wurmlet trigger, causing you to gain one life
6. Repeat from step 2

Results

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