Favorite Protection Spells/Enchantments?

I like to vary things based on the character. I had a magus who had a minor magical focus of oak. His covenant was surrounded by a ring of oak trees upon which all sorts of circle spells were cast. He had wooden armor (made supernaturally hard) and a tree that acted as a guard.

I like Ranulf from Magi of Hermes (disclosure, I wrote that chapter so I naturally wrote what I was fond of). One of his themes was doing everything as an ignem spell regardless of the availability of non-ignem ways to accomplish his goals. His talisman detected arrows (shriek of the impending shaft) and incinerated them (a linked trigger creo ignem effect). He has a spell that engulfed him in fire to convince others not to attack him lest they burn their attacking limbs off.

In the Aeldelbert thread [url]Adelbert, a "Magi of Hermes" look at intellego and Astrology] I had an intellego focused magus who developed spells to read the intentions of those around him so he could evade their blows more easily and hear violent thoughts from the minds of people or animals around him.

In fact I'll just copy and paste the unique defensive spells he's developed here so you needn't go searching through 16 pages of awesomeness to find them

A way to detect spirits