If i'm reading this correctly, if you reveal a curse token during this investigation, regardless if it succeeds or fails you can discover a clue at a connecting location or place 1 charge on Eye of Chaos? That's a nice way of mitigating potential curse token downsides, and it makes Eye of Chaos useful even without curse tokens, as unlike the other spell-based searchers it has no downsides for drawing specific kinds of tokens. (Outside of sixth sense, but that's inherently slower without the additional clue clause).
Uses (3 charges).
Spend 1 charge: Investigate. Investigate using instead of . If you succeed, discover 1 additional clue at this location. If a token is revealed during this investigation, you may discover 1 clue at a connecting location or place 1 charge on Eye of Chaos.
The other sets are:
The similarities between the spells above and this new "cursed" spell set should be plain to see. however, ironically, the "cursed" spells dont have penalties for finding tokens, they are in fact a little bit more expensive, but in-turn they're safer and have bonuses on there!
Well. Safer is perhaps a wrong way to describe it, because playing with is plenty risky in of itself.
In order not to overcomplicate these reviews, I'm assuming you already know how good it is for characters to replace their into tests, pretty much every deck packs in several of these cards, sometimes doubling up for the sake of consistency (a clue focused taking both Rite of Seeking and Clairvoyance for example). This is the way to go for most mystics, with some rare and specific exceptions.
So why would you go for the cursed set?
The cards come hardwired with a higher cost, and a risk -> gains mechanic for tokens, so obviously you'll be plying the risky waters of in a bid for more power. Try to pack in some of the obvious combos to get running on that archetype, Favor of the Moon, generators wherever you can get them (a bit of a rarity in the card lineup, so look to your off-class cards or friends to do that with you).
The unique part of Eye of Chaos to discover 3 clues may or may not be useful (because you're discovering in 2's, so if you're working on a 4 clue location discovering an extra clue is'nt useful), but even then you get a vast amount of charges to work with (assuming you get triggers). Because Eye of Chaos has 3 charges to start with, a risk-averse build can slot Eye of Chaos instead of Rite of Seeking or Clairvoyance even without to trigger it, you pay 1 more resource for effectively the same spell with no downsides.
Dont forget, you need to actually beat the penalties so an even higher baseline of than usual, with Relic Hunter and multiple copies of Holy Rosary and/or Crystal Pendulum to launch your starting point into the stratosphere.
Lastly, remember to pack a bit more resources than usual, you dont want to be too impoverished to play or run your assets!
Is this way ot playing better than the older variants? I dont think so, especially on hard where penalties can be straight up untenable, but if you're able to consistently flex tokens and overcome the penalties you'll certainly be a bit more powerful, but those are big IF's.