
About even with Ward of Protection, and we know how often that sees play. You are spared the Horror, but the cancellation isn't certain. Leaving Calvin Wright out of it, only Silas Marsh starts with a below 3, with the Remaining investigators split evenly between 3 and 4, so a (3) test shouldn't be insurmountable for most of the Survivors (and it could save Calvin from a late game Horror Treachery...). I wouldn't say that this is an auto-include, but it's certainly a useful tool in the Survivor toolchest.
I like this card better than A Test of Will (1); I'm not sure the consistency is worth the Exiling, unless you are worried about a specific game-ruining Treachery or are leaning heavily into Exile with Déjà Vu. I think I would feel worse about missing the test on A Test of Will (2) than I would on this version.
Outside Survivor, I doubt Agnes Baker or Marie Lambeau want it (unless they are doing some sort of "shut down the encounter deck" strategy). Finn Edwards and Preston Fairmont surely don't. I suppose William Yorick or Tommy Muldoon could combo it with "Fool me once..." to blank an event and cancel the next instance, too. Minh Thi Phan probably prefers Dr. William T. Maleson or Forewarned. A Tony Morgan too soft-hearted for "You handle this one!" might like this card better.