Will, Scion of Peace, Whitemane Lion, Phyrexian Altar, and Blessed Sanctuary

Prerequisites

• Will, Scion of Peace on the battlefield
• Whitemane Lion in hand
• Phyrexian Altar on the battlefield
• Blessed Sanctuary on the battlefield
• You have gained at least 1 life this turn
• Will does not have summoning sickness
• available

Steps

1. Activate Will by tapping it, reducing the cost of all white and/or blue spells you cast this turn by at least
2. Cast Whitemane Lion by paying due to Will's ability
3. When Whitemane Lion enters the battlefield, it and Blessed Sanctuary trigger
4. Resolve the Whitemane Lion trigger, returning it to your hand from the battlefield
5. Resolve the Blessed Sanctuary trigger, creating a 2/2 Unicorn creature token
6. Activate Phyrexian Altar by sacrificing the Unicorn, adding
7. Repeat from step 2

Results

• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers
• Infinite storm count