Activate Emry by tapping it, allowing you to cast Tormod's Crypt from your graveyard.
Cast Tormod's Crypt by paying 0.
Displacer Kitten triggers, blinking Emry.
When Emry enters, it triggers, causing you to mill four cards.
Activate Tormod's Crypt by tapping and sacrificing it.
Repeat.
This clever loop relies on Emry, Lurker of the Loch to continually pull Tormod's Crypt right back out of your graveyard for its zero-mana cost, fueling your triggers over and over. Every time you cast that artifact, Displacer Kitten blinks Emry to reset its tap ability and trigger a fresh self-mill. Meanwhile, Thousand-Year Elixir provides the crucial grease for the engine, granting Emry the necessary haste-like speed to tap repeatedly the moment she returns to the battlefield.