This clever loop relies on Emry, Lurker of the Loch pulling Welding Jar straight from your graveyard thanks to her tap ability, while Displacer Kitten ensures Emry never stays still by blinking her every time you cast that free artifact. Because Welding Jar costs nothing to cast, you can endlessly replay and sacrifice it to protect your board, constantly resetting Emry so her entry trigger mills your library deep into the night. Meanwhile, Temur Ascendancy grants Emry the necessary haste to start the chain immediately while serving as an engine that can leverage your creature triggers if you want to draw through your deck.