OOC: Before the narration, let me clarify how I see Second sight.
Basically it can see things that are not usually see-able, and can be used deliberately, but is more often used reflexively. My understanding of the second sight is something that people have. The higher you have in it gives a higher chance to see things. If something invisible attacks you, it is reflexive; if you want to see the ghosts around the potters field, that's deliberate.
The snakes coming out of the door are illusions to a degree, but they are simply the effect of the original wizard who made the enchantment, his sigil. The actual effect is a mentem effect; similar to Rising Ire on page 148, instead it is Rising Fear, of the door in particular. It penetrated your magic resistance.
Game:
Snatching her hand back, Illshana gasps and breathes raggedly, her eyes widening in fear and her skin going pale. Before anyone can move, she bolts for the exit!