Just a pretty neat trick for all you resto shamans out there.
Earth shield is currently castable on siege machines (I have yet to use it on the ones in Wintergrasp, i know it is currently working though in Strand of the Ancients.)
It only procs off actual people hitting it though it seems, the cannons hitting it won't heal it, but i HAVE watched the green text show up for heals when people are hitting it
by Enfeebleness