Endless One - Amazing mana sink to make huge creatures!
Adventurous Impulse - Can get rid of the top 3 cards if we are still looking for Tron but also searches for creatures
Altar of Shadows - Some removal incase we run into some huge creatures we just can't get around because we aren't running Walking Ballista
Ancient Stirrings - 1 mana searching for land but can also search for creatures
Elvish Reclaimer - Some more land searching
Chromatic Sphere - Saves us some mulligan and draws us a card
Sylvan Scrying - Some amazing land searching for our deck
Elvish Rejuvenator - A really good budget card for land searching
Steel Hellkite - Excellent removal for our deck, and is flying with a mana sink
Meteor Golem - Some more removal!
Myr Battlesphere - Excellent creature that comes with 1/1 chump blockers if needed
Ulamog's Crusher - If not dealt with this will end the game very quickly
Sundering Titan - 8 mana 7/10 and comes with some land removal
Artisan of Kozilek - Annihilator, and comes with bringing back our creatures. This goes real good with Sundering Titan in case it dies
A lot of good Tron cards are coming in ELD and will update my list soon
Please post any thought and tips!