Begin midway between Serpentine and Revelation. Climb up to a small overlap (thin pro here) then make crux slab moves just above it (5.10a). Continue up (5.8 R/X) to the second bolt on Serpentine, then climb slightly right, then directly up (5.8 R/X) to the Serpentine belay.
Thin pro for the overlap, then 1 bolt.
While the crux section is protected, much of the easier (5.7/5.8) climbing on this pitch has groundfall potential, so the overall seriousness rating is more like R/X.