Thin adequately describes this problem. So unless you have mutant fingers, use thine feet well. Start on the rail just left of the roof on north face. Reach directly up to the thin sloping rail. Grab and use this and only this thin rail to it's terminous. Yes yes!
Protection
A pad and a spot is nice. An ankle biter lies above the first couple of moves.
If I remember correctly; this is a notorious Tom Kelly sandbag. Looks V0-: probably closer to V3/4 but a great sandbag to throw a visiting friend on !! And yes, it is the crack/seam that is just above the S roof on Meditation Rock. Enjoy (your friends thrashings) !
I am only partially to blame for this somewhat contrived variant. Mark Wilford came up with the idea of traversing the seam when a bunch of folks were contriving stuff on the Meditation one really hot July day. I was the only one who thought the problem was worth the effort at the time (there were a bunch of ankle-buster blocks at the base back then), and climbed it. I agree with the V3/4 assessment, especially on a cool, dry fall day with most of the blocks cleared out.
I'd have to agree with other posts that the grade is more like V4 in good cool and dry conditions. I still think this is bloody hard when it's hot (think I first sent it on a summer afternoon).
This is a good V4 - for an eliminate. Then again this is Rotary we're talking about here, gotta love it. Anyway, this is probably the most obvious, eliminate line on the south side combining some finger strength as well as a little technique.