Have you thought about Goblin Engineer ? Since the token is an artifact you can reanimate then sac it for any 3 cmc artifact in the deck.

toxicliam I've thought about it but it seems slow and interruptible. It's been on the mental list for sure. It can fetch some big-time stuff for sure and if the fetched things get destroyed it can still bring them back, which is awesome. Not sure what I'd cut though

I think toxicliam is right about putting it in, if you need an idea of what to cut then take out Spitebellows and replace him with Goblin Engineer ; You can use the goblin to grab Meteor Golem if you are having creature problems otherwise hes a two mana tutor in a color that generally lacks them. If you have your commander out it suddenly reads pay this turn and make your opponent sad, I cant stress enough how powerful this is for you. Love the deck.

The biggest thing i saw was that you can use it to easily grab Sundial of the Infinite or Thousand-Year Elixir . ALso Gadianten is right you can tutor some forms of removal and even a boardwipe in the form of Steel Hellkite .