Blade Splicer - 4 power for 3 mana is a good deal. A 3/3 first striker is great at eating up aggro creatures.
Thopter Engineer - Source of an artifact and haste. Ideal Shape Anew artifact source to make Blightsteel Colossus finish the game that turn.
Pia and Kiran Nalaar - Fantastic creature on it's own. Plays the tempo plan while also producing artifacts for Shape Anew.
Restoration Angel - Blinks artifact producers and a damage source that's hard to block.
Snapcaster Mage - This deck is a Tempo/Control shell with a lot of spells worth playing twice.
Blightsteel Colossus - This deck's alternative win condition when tempo beatdown isn't possible. Against most decks, a resolved Shape Anew into Blightsteel is a death sentence.
Shape Anew - Cheats Blightsteel Colossus into play.
Lightning Bolt - Format staple burn spell.
Lightning Helix - Burn with lifegain attached to it. Can't go wrong.
Serum Visions - The best dig spell in the format.
Mana Leak - Countermagic for problems.
Izzet Charm - In my opinion, the best card in Modern. It does everyting you need it to do: Kills creatures, counters spells, or digs for needed cards. Also a discard outlet if Blightsteel Colossus ends up in my hand.
Path to Exile - Removal for creatures that can't be burned away.
Fetchlands & Shock Lands - Modern's Manabase
Celestial Colonnade - Fallback threat. Colonnade beatdowns with burn backup are the largest source of victories.
Desolate Lighthouse - Card quality engine. Discard outlet if Blightsteel Colossus ends up in my hand.
Ghost Quarter - Utility land hate.