Saheeli, Radiant Creator, Lightning Runner, Aethertide Whale, and Bard, King of Dale

Prerequisites

• Saheeli, Radiant Creator on the battlefield
• Lightning Runner on the battlefield
• Aethertide Whale on the battlefield
• Bard, King of Dale on the battlefield

Steps

1. At the beginning of your combat phase, Saheeli triggers, causing you to pay to create two token copies of Aethertide Whale with haste
2. When the Aethertide Whale tokens enter the battlefield, they trigger, causing you to get twelve
3. Declare Lightning Runner as an attacker, triggering its ability, causing you to get and then pay eight to untap all creatures you control and to get an additional combat phase after this one
4. Repeat each combat phase

Results

• Infinite ETB
• Infinite LTB
• Infinite combat phases
• Infinite creature tokens with haste
• Infinite death triggers
• Infinite energy counters
• Infinite mana creatures you control can produce
• Infinite sacrifice triggers
• Infinite untap of creatures you control