Sounds expensive, but okey-ish, if:
- You have high willpower and/or
- you are wearing Fine Clothes and/or
- you are Alessandra Zorzi and/or
- the enemy has no horror value
until you realize you can use String of Curses as a fail-safe! Granted, it's too inefficient to fail on the test purposely, but the fact that you still get what you wanted to do with playing one more card is pure ASMR to me.