Ghave, Guru of Spores, Carnival of Souls, Soul Warden, and Panharmonicon

Prerequisites

• Ghave, Guru of Spores on the battlefield
• Carnival of Souls on the battlefield
• Soul Warden on the battlefield
• Panharmonicon on the battlefield
• Ghave has at least two +1/+1 counters
• available

Steps

1. Activate Ghave's first ability by paying and removing a +1/+1 counter from it, creating a 1/1 Saproling creature token
2. The Saproling enters the battlefield, triggering Soul Warden and Carnival of Souls twice
3. Resolve both Soul Warden triggers, causing you to gain two life
4. Resolve both Carnival of Souls triggers, causing you to add and lose 2 life
5. Activate Ghave's second ability by paying and sacrificing the Saproling token, putting a +1/+1 counter on Ghave
6. Repeat

Results

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