[Wait- who? Going with a safe answer might be better. You can not be too sure when dealing with powerful magics that the one being discussed, isn't watching. ]

Perhaps?

Whoever is doing this, must be extremely powerful. It is a unique illusion and something I have not witnessed before...

[Why yes she did trail off! She's trying to poke at the 'illusion' with her own magic .. and failing ... hard. Which, isn't normal in the least. ]