The talent states: Every 8 seconds, Kerillian’s next Ranged Attack consumes no resource and restores 3 permanent health.
But it doesn’t work with the right click. I mean, it reduces the overcharge cost, but doesn’t recover the 3 points of permanent health unless you used the basic firing option to proc it. At least, for me.
I assume that is because the levitate isn’t technically an attack, as it deals no damage on its own. It would be nice if it did give the health though.