I get it, it's also for Calvin Wright. An investigator card is also a "player card with health and/or sanity at your location", so Calvin can use this (it's has the Spirit trait) as extra insurance. Not super crazy a combo, but the card itself is not bad (1 resource - fast - for 1 damage/horror in the worst case) and it fits his playstyle. I'd say for him it's even better than Talisman of Protection - doesn't eat a slot, costs 1 resource less and the Talisman can get triggered only for 1 damage/horror, which always feels like a waste.
"But mistah, where charges?!", I hear you say.
Answer: Like I explained, the card is already good-ish in the worst case (having no charges), but Calvin also has access to Winds of Power, Earthly Serenity aaaaand... drumroll Bangle of Jinxes, a card that replenishes charges! Yeah, the slot is not great, but with the card in play you can mitigate downsides of an an attack and get the payment for the mitigation at once.
Again, not crazy, but I like it :)