Just a quick question regarding Monster Summoning. Dose a summoned monster leave a corpse when it's dead? Does it return back to it's home plane upon it's destruction? My DM seems to be of the mind state that summoned monsters don't really die, when they "die". And instead they simply return back to that plane unscathed. Though I don't see any evidence for this, so with that being said I think it would make Monster Summoning spells great Death Knell fuel. A good spell but one that rarely ever gets used because of the precise nature of it's use.
Has anyone ever tried using it by knocking a summoned monster below 0 HP then casting it on them?
Thoughts?