"Charos:
Well, you remember earlier when I spoke about souls. About how they're containers of anima that shape the anima with our experiences? Yes well. It appears that your soul is...different. It looks like when Guthix made you the World Guardian, by giving you some of his divine power, he also gave you something else. I believe the dragonkin called it 'shadow anima'. Your soul contains a carefully constructed enchantment of that shadow anima."
"Charos:
Cast that aside. Let's focus only on good things. Like this little barrier here. You know this lab is protected? Well it seems it's protected by this shadow anima. Which explains the lack of direct assistance from grandma Jas herself. Your average anima based lifeforms, like myself, Hannibus and even Thok here, we can't cross that barrier without being torn apart. But to you it'll be about as unpleasant as the heaviness of the air before a storm. You might feel a slight tingle, but otherwise you'll be fine. So by infusing your soul with this reality destroying shadow anima, Guthix may have given you exactly the protection you need to save this world. Which is very handy I think. But, whilst I would love to discuss this topic, at length, I'm afraid we just don't have the time. I've used the resonances we've picked up from the measure and unlocked this door. Until you can shut down that shadow anima barrier, we can't come with you. But as soon as it's down, we'll be there. So this is it, World Guardian. Time to save us all. Make sure you have that doohickey that Jas gave you, I suspect you'll need it.
It is incredibly clear, it is what guthix put in our body and enchanted it in our souls that protect us from shadow anima. Charos, Hannibus, or even Thok, or even grandma Jas can't enter the lab without being torn apart but the World Guardian acan.