Tamest basic weakness in the game? It doesn’t cost you any actions at all to deal with, all it really does is cost you a card and maybe a test or two down the line. Draw it late? No issues. Playing on expert? You have testless options abound anyway. Playing with new cards that care on any level about curse tokens? This is actually beneficial to you. And finally you might actually be using cards that convert curse to bless, in which case this is easily circumvented. This might hurt more in Innsmouth depending on what the scenarios do with curse and bless, but outside of that campaign, this seems incredibly easy to deal with.

EDIT: I take it back, only because Day of Reckoning got spoiled unexpectedly. Check that one out for an even tamer weakness.

Combine it with Dayana Esperence and low cost powerfull spell like Deny Existence. Shining Trapezohedron will cancel the additional cost (spend secret and exhaust Dayana) and allows you to play Deny Existence each round after passing 0 test.

Note that this search only checks the encounter deck, not the discard pile (and victory display). For that reason, it's a good idea to advance "Harlan's Curse" when all 3 Acolytes are in the discard/play (or even just 2 Acolytes in the discard/play when 3/4 player) - this prevents the spawn.

Of course you might be dealing with the other version of this act, so this gambit might have no effect. But if it works well, it can be nice.

How does this work together with cards that need multiple actions to activate like the new forbidden tomes?

Forbidden Tome Forbidden Tome

Is the multiple actions needed as a part of the trigger or a part of the cost?

An elite monster that can gain massive and readies itself is threatening. It’s why it’s the only monster in the module it’s in. (Bad news for guardians who like fighting a lot of people... hope your party has stubborn detectives, creatures from the crystallizer and the like to keep you busy.) but a few investigators make quick work of this beast…The first one Is Jaqueline, who can pull multiple tokens. Another is Trish, who can use a fast or ~ ability to get clues and evade the monster in 0 actions. That means the deadliest thing in this module is probably getting a infinite hallway in the main corridor, running through your deck and taking 10 damage. Make sure to Delay the Inevitable or Defy Reality.