Perhaps, but we know that the "Hero" of lv4 slayed something, it would not surprise me if he failed and only damaged that being. Maybe a struggle ensued or whatnot. however its safe to say I don't think the people of Exanima's current day hold a candle to those that ventured into the underground. So if it does indeed awake, damaged or not, I would suspect it will have no problem with the worlds current peoples, save for a few thaumaturges. Given that line of reasoning I don't think we have much reason to suspect a PC deity or greater powers than the Guardian, yet atleast. Exanima is not complete, I suspect our perspectives will change a lot in the next few levels.Regarding the "abandoned and damaged being", I suspect it's a reference to the source of the SG PC's ability to reincarnate (It sends "ancient weapons to walk among the people", sounds like a great description for 100% immortal beings!). The Guardian of the Underworld is likely what's driving the Thaumaturges mad as suggested by a lot of scrolls in Exanima. Thaven and the necromancer are likely the first victims of its spreading influence. If it's power is extending into the Overworld too, it's likely not so much "damaged" as "growing way too powerful to contain"! He's more likely the "impending threat" that woke up the PC's deity.