The land you play most frequently is Pylons since it will be the most frequent land you tutor for with Greenblade and Armadillo: it comes into play untapped, it surveils, and helps ensure there are not issues with the color pips in your cards
Or maybe you have Crucible of Worlds to keep playing the lands, who knows
This time, the land enters with a stun counter, shutting the opponent off of mana the next time they untap
The Wind Crystal Limited The power of The Wind Crystal is entirely wrapped up in the activated ability
Boros Signet, Promise of Tomorrow, and Darksteel Forge are all great choices
Mana Value 5 and Beyond More expensive green ramp cards can offer even more of a mana advantage, but these cards usually only see play in decks that are truly gluttonous for mana