This is a really great card and obviously the strategy is going to be how to make sure you can protect it so you don't lose the XP investment. Cherished Keepsake is one obvious route as is Charisma plus Peter Sylvestre.
Cost: 1. XP: 1.
Health: –. Sanity: 3.
You get +1 .
Non-direct horror must be assigned to Guiding Spirit before it can be assigned to your investigator card.
Forced - After Guiding Spirit is defeated by horror: Exile it.
Union and Disillusion #236.
Calling in favors comes to mind as a last minute save for this one — Dustgod · 1
Or Charisma plus a second spirit to protect the first. It mostly depends on how much sanity buffer you expect to need, but even if you do lose it, a 1 xp loss isn’t the worst. — Death by Chocolate · 10