Activate Emry by tapping it, allowing you to cast Lotus Petal from your graveyard.
Cast Lotus Petal by paying 0.
Displacer Kitten triggers, blinking Emry.
When Emry enters, it triggers, causing you to mill four cards.
Activate Lotus Petal by tapping and sacrificing it.
Repeat.
This ingenious loop turns a graveyard into an endless engine for mana and triggers by exploiting Emry, Lurker of the Loch's ability to repeatedly fish Lotus Petal out of your graveyard. Every time you recast that Lotus Petal, Displacer Kitten's avoidance trigger steps in to blink Emry, letting her fresh entry mill more cards and resetting her tap ability. Meanwhile, Tuktuk Rubblefort quietly ensures that Emry gains haste so she can immediately tap again the moment she returns to the battlefield.