Quote Originally Posted by Chives View Post
Ardon was able to kill Groffnar because the dwarf had summoned the guardian.

http://willsaveworldforgold.com/?p=1390

Having the Guardian in the physical world weakens the summoner considerably.
Makes sense though I'm curious why one of them was able to say his eulogies while powering down after Groffnar died but the other one disappeared immediately after the castle crashed. The task most likely wasn't done as the city was still in danger from gargoyles so they were both dismissed from caster death. Do they just take a large amount of damage each turn until they disappear and so the one that was in combat disappeared first? Do they store energy over time so the longer they are summoned the longer they last if power is severed?