Wriggling Grub, Chthonian Nightmare, and Phyrexian Altar

Prerequisites

• Wriggling Grub in the graveyard
• Chthonian Nightmare in hand
• Phyrexian Altar on the battlefield
• undefined available

Steps

1. Cast Chthonian Nightmare by paying
2. When Chthonian Nightmare enters the battlefield, it triggers, causing you to get
3. Activate Chthonian Nightmare by paying , sacrificing another creature and returning Chthonian Nightmare from the battlefield to your hand, returning Wriggling Grub from your graveyard to the battlefield
4. Activate Phyrexian Altar by sacrificing Wriggling Grub, adding
5. When Wriggling Grub dies, it triggers, creating two 1/1 Worm creature tokens
6. Activate Phyrexian Altar by sacrificing a Worm, adding
7. Repeat

Results

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