The good news is that this won't kill Harvey outright from full Health unless you are doing some Dream-Enhancing jankery before you find this. The bad news is that you will want to keep your hand size low until you draw this, and that is not Harvey's jam. Much like The Home Front, timing is going to be everything with this card, and seeker is not exactly great with soaking Damage. You could work with Charisma and Miskatonic Archaeology Funding to build a meat shield, but that's a lot of XP, Resources, and actions. You could add Mr. "Rook" and dig like crazy for it, but Harvey doesn't really need Rook otherwise, since he will have his whole deck in is hand sooner or later. On the other hand, nothing says "gambling with your life" like being a faculty member with a grant opportunity on the line.
In short, a very flavorful weakness.