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

Emry, Lurker of the Loch

Chthonian Nightmare

Lion's Eye Diamond

Inalla, Archmage Ritualist

How it works

1. Activate Lion's Eye Diamond by tapping and sacrificing it and discarding your hand, adding .
2. Activate Chthonian Nightmare by paying EEE, 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 1 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 0.
10. Cast Chthonian Nightmare from your hand by paying 1.
11. Activate Lion's Eye Diamond by tapping and sacrificing it and discarding your hand, adding .
12. Activate Chthonian Nightmare by paying EEE, 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.

This infinite loop turns Emry, Lurker of the Loch into a recursive engine by leveraging Chthonian Nightmare's energy generation and return ability to constantly cycle Emry in and out of the graveyard. Lion's Eye Diamond fuels the necessary mana along the way, while Inalla, Archmage Ritualist provides the essential Wizard presence from the command zone to trigger copy effects via her eminence ability whenever Emry enters the battlefield. Because Emry's tap ability lets you recast the sacrificed Lion's Eye Diamond directly from the graveyard, the sequence becomes completely self-sustaining.