
Surprised in the number of reviews that Carolyn or Vincent are not mentioned at all for this card as they are perhaps the best users of it. As test-less damage for them is really good... like really really good:
1) They have one less stat overall so get rewarded more for test-less actions
2) They have one more health/sanity overall so are more tanky for the enemies attack
3) They get rewarded for healing the damage/horror they took
4) They can combo it with Empirical Hypothesis's 1xp upgrade for when you take damage/horror to also draw a card from it
5) For Carolyn she can stick it on Stick to the Plan
So for example, watch as your Carolyn clears a nearby room full of cultists or helps the actual Guardian smack an annoying enemy into the discard pile on demand. All while she grabs a test-less clue, resource, and card per turn (Field Agent, Empirical Hypothesis, Ancient Stone). A support character than can free flex into a Guardian role a few times a scenario all the while actively keeping the act progress going with getting clues and keeping others alive is very strong and this card helps complete that.