Kranchan wrote:
So I know I can use enlarge person via share spell on my eidolon but can I buy a scroll of permanency to then make it permanent? Would this effect stay when unsummoned and then resummoned? I'm wondering because the wording says you only summon an aspect of the creature.
I would say yes with a catch.
"Eidolons are treated as summoned creatures, except that they are not sent back to their home plane until reduced to a number of negative hit points equal to or greater than their Constitution score."
As I read it you could summon your Eidolon, cast Enlarge and then cast permanency. But if it's hit points were reduced to the point where it returns to its home plane you would have to summon it again and re-cast Enlarge and Permanency.