If a caster with the ability to spontaneously cast some spells (such as a Cleric or Druid) prepares a lower-level spell in a higher-level spell slot, what level is used for the spontaneous spell?
ie. Lets say a druid prepares Obscuring mist (a 1st level spell) in a second level slot. Later, our hypothetical druid chooses to lose that spell in exchange for a Summon Nature's Ally. Does she get a Summon Nature's Ally I or Summon Nature's Ally II
The exact wording of Spontaneous Casting says
A druid can channel stored spell energy into summoning spells that she hasn’t prepared ahead of time. She can “lose” a prepared spell in order to cast any summon nature’s ally spell of the same level or lower.
So it seems like it should be the level of the spell, not the slot, but I wanted to make sure since it's a bit of an edge case.