Tron lands

[prayos]

What are they and what format/deck are they used in?

[Kaleo42]

 {Urza's Mine} + {Urza's Tower} + {Urza's Power Plant}

They're used to ramp into things like {karn liberated} and eldrazi.

[Imdowd80]

Let's not forget, helping to throw a huge fireball.

[InfinitiveDivinity]

Let's not forget, helping to throw a huge fireball.

{Banefire}, so much better =P

[prayos]

Why are the called Tron lands?

[Maximo]

The decks the lands are in are usually referred to as UrzaTron decks, because you assemble the three pieces of the deck that start pumping out geysers of mana, usually for colorless spells or such. You form Voltron!

[Birdbrain]

Let's not forget, helping to throw a huge fireball.

{Banefire}, so much better =P

Yea, though {fireball} can hit more targets