Quote:
You fight a Cait Sith and Atomos, at the same time, at one point during WotG. Atomos is incapable of moving, it just sits in the middle of the tiny arena and fires stuff from what I remember. I can say with 95% (5% shaved off due to it being SE we're talking about) certainty that Atomos will be a 2 hour summon based on this alone. The only other option would to make...it unable to move, so you would only be able to attack if the enemy is near Atomos while he's out, which I highly doubt will happen.