I felt it was important to point out that this card specifically says "deal 1 damage to a card with health at your location" which includes enemies since they are a card with health who are often at your location. I'm not sure if its intentional as it feels like it was meant to say "deal 1 damage to a player card with health at your location". But if that does get errata/taboo would make the card practically unplayable as 3 EXP for an extra ? and choice of player damage isn't the best.

Regardless of intention it's a great card as it lets you pass a test and deal 1 damage to an enemy at your location, as committing +5 to test will easily push you over the standard bag for most tests. Furthermore, since it's a Spell card it can be fetched with Arcane Initiate and others.

Got a Whippoorwill/Zealot annoying you, but don't want to spend the actions to engage/fight it? Well just investigate your location using its blood.

Want to help the Guardian burn down that Elite? Commit this to a standard Cosmic Flame attack to deal 3 damage. It's also super safe if that Elite is engaged to the Guardian since both Cosmic Flame's bonus damage and this are predicated on you succeeding.

All this to say have fun blood bending enemies into passed skill tests.