The spell Instant Restoration seems, at face value, like it is a one-time cast spell with no need for a duration. The spell stops a summoned creature from dying, gives it 4d8+(1*CL) hp, and that seems like the end of it.
The wording on this one seems very clear until I look at the duration.
It appears that the spell lasts 1 round per level. The only things I can assume by this, is that it either
- Heals the healing amount every turn, which seems absurd, for its level. Or
- The creature, in question, dies as it would have normally, after the spell's duration is over.
However, it says no such thing in the description, and even goes out of its way to mention
"it remains as if its hit points had never dropped to 0 or fewer".
so, I see nothing specifically indicating that this would be the case. Most spells try to go out of their way and explain what happens at the end of a duration, explicitly, which leads me to believe this is a typo, of some sort.