Explanation of Cards:
Alloy Myr: Helps with mana fixing and generating colorless mana.
Contagion Clasp: This allows for more proliferate options if you can't get an engine.
Contagion Engine: The main card of the deck, can wipe out all of your opponent's creatures and is the main proliferate card.
Everflowing Chalice: With proliferate this card can generate tons of mana. When you can untap it it is even better :)
Fabricate: Just fetches the artifacts you need to get the combo going.
Inexorable Tide: Everything proliferates :)
Jayemdae Tome: Once you get some mana and untapping you can draw your entire library to get the cards you need.
Unbender Tine: Able to untap any of your permanents, needed for infinite combing.
Unwinding Clock: In case you can't get infinite going, this makes it so you can wreck your opponent even on their turn.
Viral Drake: More proliferate, and can poison the opponent for an easy win condition.
Overall this deck looks really fun. I don't have the cards so I would be buying them all as singles. Because of that I am trying to keep this deck as budget as possible. If you have any suggestions feel free to comment, I will consider anything someone has to say.
I don't think mana cylix is necessary. If you really need the mana fixing like that, I would put in Prophetic Prism over that. I would def. put in thrummingbird over viral drake.