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If I'm understanding you right, you're wondering if the Masking/Extended masking that you can use to hide being awakened can be used to keep others from noticing that a spell is being cast by you, right?
Yes, that is what I am asking.
QUOTE
No, you can't hide the act of casting a spell with Masking or Extended Masking, but with Extended Masking you can hide on-going spells (i.e. sustained or quickened spells).
Thats where I am confused... if a spell can be sustained, then cant extended mask apply to cover its magical aura? But when you cast something, you have a magical aura, but thats covered by masking, like if you were making yourself look like a mundane. So then, the only magical aura that would be around, would be the target of your spell, like control actions for example. However, with extended mask, that magical aura would not show because it is a sustainable spell?