Emry, Lurker of the Loch, Chthonian Nightmare, Lion's Eye Diamond, and Inalla, Archmage Ritualist

Prerequisites

• Emry, Lurker of the Loch in the graveyard
• Chthonian Nightmare on the battlefield
• Lion's Eye Diamond on the battlefield
• Inalla, Archmage Ritualist on the battlefield or in the command zone
• You have at least
• You control at least one additional creature

Steps

1. Activate Lion's Eye Diamond by tapping and sacrificing it and discarding your hand, adding
2. Activate Chthonian Nightmare by paying , sacrificing another creature you control, and returning Chthonian Nightmare from the battlefield to your hand, returning Emry from your graveyard to the battlefield
3. When Emry enters the battlefield, it and Inalla trigger
4. Resolve the Emry trigger, causing you to mill four cards
5. Resolve the Inalla trigger, causing you to pay to create a token copy of Emry with haste
6. Put the nontoken Emry into your graveyard due to the legend rule
7. When the Emry token enters the battlefield, it triggers, causing you to mill four cards
8. Activate the Emry token by tapping it, allowing you to cast Lion's Eye Diamond from your graveyard this turn
9. Cast Lion's Eye Diamond from your graveyard by paying
10. Cast Chthonian Nightmare from your hand by paying
11. Activate Lion's Eye Diamond by tapping and sacrificing it and discarding your hand, adding
12. Activate Chthonian Nightmare by paying , sacrificing the Emry token and returning Chthonian Nightmare from the battlefield to your hand, returning Emry from your graveyard to the battlefield
13. Repeat from step 3

Results

• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite self-mill
• Infinite storm count