Trudge Garden, Ashnod's Altar, and Carmen, Cruel Skymarcher

Prerequisites

• Trudge Garden on the battlefield
• Ashnod's Altar on the battlefield
• Carmen, Cruel Skymarcher on the battlefield
• 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
3. Activate Ashnod's Altar by sacrificing the Fungus Beast, adding
4. When the Fungus Beast dies, Carmen triggers, causing you to gain 1 life and put a +1/+1 counter on Carmen
5. Repeat from step 2

Results

• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite lifegain triggers
• Infinite lifegain
• Infinite +1/+1 counters on Carmen