Saheeli, Radiant Creator, Guide of Souls, Aurelia, the Warleader, and Gonti's Aether Heart

Prerequisites

• Saheeli, Radiant Creator on the battlefield
• Guide of Souls on the battlefield
• Aurelia, the Warleader on the battlefield
• Gonti's Aether Heart on the battlefield
• undefined

Steps

1. At the beginning of your combat phase, Saheeli triggers, causing you to pay to create a token copy of Aurelia that is a 5/5 artifact creature
2. Put the oldest Aurelia into your graveyard due to the legend rule
3. When the Aurelia token enters the battlefield, Gonti's Aether Heart and Guide of Souls trigger, causing you to get and gain 1 life
4. Declare the Aurelia token as an attacker
5. The token triggers, causing you to untap all creatures you control and to get an additional combat phase after this one
6. Repeat each combat phase

Results

• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite lifegain triggers
• Infinite combat phases
• Infinite lifegain
• Infinite untap of creatures you control
• Infinite mana creatures you control can produce