Insight. Science.

Cost: 0.
Test Icons:

Place 1 of your clues on your location. Then, heal 3 damage from an investigator or Ally asset at your location.

Unconventional ailments require unconventional treatments.
Darek Zabrocki
The Scarlet Keys Investigator Expansion #46.
Bizarre Diagnosis

As of its release, this is probably the most straightforward and effective damage healing in the game, ahead of Earthly Serenity. Basically does what an entire First Aid would do, in one action with no resources, at the cost of temporarily dropping a clue you probably picked up with action compression (Deduction, Fingerprint Kit, Trish) anyway.

Being flexible enough to patch up a Beat Cop, Grete or Bystander is a plus.

Teag · 46

Does anyone know if you need a clue to play this card/get the healing from this card? My interpretation is that because those effects are in separate sentences they are separate effects. Especially because the card does not say you need to place a clue in order to heal.

A simple look in the rules give you the answer: If the pre-then aspect of an effect does not successfully resolve in full, the post-then aspect does not resolve. — Tharzax · 1
Specifically, there is a rule under "Then" that explains how that word has special significance on cards. Also check out "Must". — Hylianpuffball · 25
Image it being for 0 resources and not requiring a clue (as a cost). — bugiel_marek · 12