I'm always bothered by cards that have strengths
dependant on your opponent. But, this could be a
decent sideboard card if you knew your opponent
was playing 70% or better (which some decks are)
of the nonbasic variety. It's an interesting
option, but nothing that's devastating.
In a format coming off of Ravnica, this could be
pretty awesome. Goodness knows Standard decks
are chock full of nonbasic lands, and this could
get awesome quickly, but it's really a sideboard
card. Besides, Dryad Sophisticate hoses
expensive manabases much more effectively.
Wilderness
Elemental - Nothing very surprising, here. A
nonbasic land counting elemental creature isn't
anything unexpected. It's fairly mediocre as
well. If you play it on turn three, and assume
that your opponent has three nonbasic lands
(which is a lot for turn three), then you've got
a Trained Armodon. Now, elephants are nice and
all. But I wouldn't call them constructed
playable. And, of course, this thing is next to
useless in Coldsnap limited where nonbasic lands
are usually limited to Mouth of Ronom and Scying
Sheets. No, I don't think there's much use for
Wilderness Elemental anywhere. Too bad, it looks
pretty cool.