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 wondrous engine transforms the humble Lotus Petal into an endless fountain of colored mana by leveraging Emry, Lurker of the Loch's ability to constantly fish it back from the graveyard. The magic truly ignites thanks to Displacer Kitten: every time you recast that zero-mana artifact, the Kitten blinks Emry away and brings her right back, refreshing her tap ability and triggering a fresh round of self-milling. To make sure you can tap Emry the very second she drops back onto the battlefield without waiting around, Fires of Yavimaya generously grants all your creatures haste.