Illumian Power Sigils

[Matamane]

I was wondering if there was a way to gain a third, fourth, or dare I say sixth power sigil to better aid multiclassing?

[Optimystik]

From what I can see, two is all you get.

I hear that initially, they gained more as they gained levels, but that was scrapped during development.

[Matamane]

Illumian Chameleon would be awesome though