Read those cards again. Expedition map allows me to search for land cards, Sphere and Hart only allow me to search for Basic land. This is a huge deal in a deck that runs tron.
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you can do the same with two myr galvanizers and two irons. though palladiums more effiecent if i need red mana the iron is much more useful
It's not modern legal
Acidic Slime would go tops in this deck.
I'd Add a Set of Groundswell into this, one drop green with landfall, it's +2/+2 without land being played that turn, but with land it's +4/+4 with glistener and giant growth, and mutagenic you can swing for 10 posion counters turn 2.
It's a very low budget deck, however the mutagenic growth is in there for the earliest possible win, say turn one i play a forest and Glistener, turn two a forest i tap two forests one for giant growth one for groundswell, he's now an 8/8, i can pay two life to add the extra +2/+2 i can win the game then. Which is why i favour Mutagenic over Rancor. (plus mutagenic is much cheaper)