Emry, Lurker of the Loch + Displacer Kitten + Urabrask the Hidden + Lion's Eye Diamond

Emry, Lurker of the Loch

Displacer Kitten

Urabrask the Hidden

Lion's Eye Diamond

How it works

1. Activate Emry by tapping it, allowing you to cast Lion's Eye Diamond from your graveyard.
2. Cast Lion's Eye Diamond by paying 0.
3. Displacer Kitten triggers, blinking Emry.
4. When Emry enters, it triggers, causing you to mill four cards.
5. Activate Lion's Eye Diamond by discarding your hand and sacrificing it.
6. Repeat.

This intricate machinery centers around Emry, Lurker of the Loch, whose tap ability lets you repeatedly pull Lion's Eye Diamond straight out of your graveyard and cast it for free. Every time you cast that zero-mana artifact, Displacer Kitten's avoidance trigger steps in to blink Emry, resetting her tap ability and letting her mill four more cards upon re-entry. Meanwhile, the haste granted by Urabrask the Hidden ensures that Emry is immediately ready to tap again the moment she returns to the battlefield, completing the continuous loop that lets you crack Lion's Eye Diamond over and over for infinite colored mana.