Summon Eidolon question (not augment)

[Calypsopoxta]

There's an important piece of information missing from this spells' description. Can an Eidolon summoned by this spell act immediately?

Side question: Do Eidolons become staggered or go unconscious at -1 hit points?

[t3hd0n]

wow the lack of response for this post is crazy.

i'd treat it like a summon spell, its 1 full round to cast so it comes out at the beginning of your turn; it acts immediately.

secondly, when it goes to less than 0 it goes back to where it came, simply because its a summon spell.

*edit* minor grammatical error