Thran Dynamo instead of Ur-Golem's Eye? Same costs, just provides 3 mana instead of 2.
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If you're looking to have a greater chance of drawing the combo, you could try adding in some Twincasts, or some See Beyonds or Preordains for draw help. I think the Twincasts make it non-standard though, not sure if that's what you were going for.
Lol @ building on a budget copy...
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