This clever loop relies on Displacer Kitten to act as an engine whenever you cast a noncreature spell, blinking Emry, Lurker of the Loch back onto the battlefield so she can mill cards and reset her tap ability. Because Tormod's Crypt costs zero mana to cast, it serves as the perfect noncreature fuel to trigger the Kitten over and over while you repeatedly pull the Crypt right back out of your graveyard using Emry's activated ability. While Dragonlord Kolaghan sits menacingly in the command zone or your hand, this entire self-milling cycle turns the zero-cost artifact sacrifice of Tormod's Crypt into an endless stream of triggers for your enter-the-battlefield and artifact loops.