Here is how the combo works.
Any combination of Mirran Spy, Molten Nursery, Altar of the Brood, Kozilek's Sentinel, and Nettle Drone (that's right, all of these in almost any order can win you the game)
Zero cost artifact (DO NOT USE MEMNITE OR ORNIThOPTER: zero cost artifacts in this deck can protect themselvs pretty well. Memnite and Ornithopter are weak and frankly scare opponents.)
Retraction Helix or Banishing Knack
Turn 1
Land for turn
Altar of the Brood
Turn 2
Land
(Possibly) Kozilek's Sentinal
Turn 3
Either Mirran Spy, Nettle Drone, or Molten Nursery
Turn 4
If Altar and Mirran Spy/ Nettle Drone are OTB, play Retraction Helix/Banishing Knack on either creature to infinitely mill the enemy deck. You've won the game!!! Horray....
If you don't happen to have Altar out, play either Molten Nursery or Nettle Drone.
Turn 5
Retraction Helix/Banishing Knack on either creature. Win the game
I realize that my explanation of this deck is terrible at best, so here is a video of the most basic way this deck works: https://www.youtube.com/watch?v=P-3NjBVh8Mw
