[Phantasm]

Addendum to my previous post:

I agree with the others that Recover Energy should never apply to a powerstone.

I believe DF5: Allies has info on whether a familiar has access to its master's spells, particularly Recover Energy, at least in DF-land. If the familiar has access to those spells, then I would say "yes"; if not, then "no".

Recover Energy's an odd duck even among spells because it's more of an automatic "Regeneration (FP/ER Only; 1 FP/ER per ten minutes (give or take); Accessibility: Only When Resting)" deal than it is a proper spell, a relic of 3e or possibly even 1e's magic rules from before Regeneration was that big a thing (and possibly even before Regeneration was added to the rule set).

If I was redoing Magic, I'd probably get rid of the spell altogether, replacing it with a custom "refresh energy" advantage.