I thought I should just point out the differences from the L0 version because it took me more than one second to notice.
- +2 willpower to the test
- Bonus effect triggers FOR EACH curse revealed, rather than just once.
- Extra willpower icon
I haven't played with Curses enough to know whether this triggers twice enough to make it worthwhile, but it seems like it'd require a full bag of curses to get good value out of it. I think I'd generally be happier with the extra clue from Rite of Seeking or Clairvoyance, despite their downsides.