So yes, there were the base Mana producing elves, Fyndhorn Elves and Elder, but the fast Mana for Green came from Tinder Wall, which changed the way Green/Red decks were build forever
With enough mana, you can do nasty things like discarding Grave Scrabbler to Pack Rat
While tweaking preconstructed decks is always fun, the customization that really makes Planechase stand out is the Planar cards themselves
A PSA grade 10 Stitch card racked up over $4,000 at auction in mid-October, and that's just one of the cards that have sold for several thousand on a secondary market
Mulldrifter A 2/2 flying dude and 2 cards for 5 mana is pretty good
It's card advantage over time and immediately outclasses several pieces of equipment and effects out there