Agatha's Soul Cauldron, Kiki-Jiki, Mirror Breaker, Lurking Roper, and Trostani, Selesnya's Voice

Prerequisites

• Agatha's Soul Cauldron on the battlefield
• Kiki-Jiki, Mirror Breaker in exile
• Lurking Roper on the battlefield
• Trostani, Selesnya's Voice on the battlefield
• Lurking Roper has at least one +1/+1 counter on it and does not have summoning sickness

Steps

1. Activate Lurking Roper using Kiki-Jiki's ability by tapping it, creating a token copy of itself with haste
2. When the Lurking Roper token enters the battlefield, Trostani triggers, causing you to gain life equal to Lurking Roper's toughness
3. Each Lurking Roper you control triggers, untapping themselves
4. Repeat
5. You may also target any nonlegendary creature you control

Results

• Infinite copies of nonlegendary creatures you control with haste
• Infinite creature tokens with haste
• Infinite death triggers
• Infinite ETB
• Infinite lifegain
• Infinite lifegain triggers
• Infinite LTB
• Infinite sacrifice triggers