I don't know the system very well so I'm not going to cover everything, but let's give this a try. ^_^
Does this work on Hedge plants? If it does, I guess it's probably rather great for harvesting Goblin Fruits and exploring the Hedge.
My first thought was sneaking past guards. It's probably also great for escaping from combat, since Cora isn't that great in a direct fight. Perhaps a social debuff too? I don't know how the penalties work, so I'm not sure.
Great for harvesting Glamour from emotions, of course. But the information gained can also be used for other things, such as intimidation.
Cora already has superhuman Composure, and this makes her even more imperturbable. A dice pool of 12 should usually produce quite a number of successes, so it's a rather hefty penalty to supernatural attempts to scare her.
I'm slightly confused. Does her ally not gain any resistance to supernatural sources of fear if they don't resist when she uses this contract on them?
It only works on things out to 7 yards, but within that distance, it's pretty hard to hide from Cora unless you're of a similar or greater level of power.
Combined with her Gravewight power, this means she can communicate with ghosts any time she wants, for no Glamour cost. Well, as long as her roll doesn't fail, but I don't think it's likely to. 8 dice is fairly decent if you're not taking any penalties.
That dicepool is huge.
If she gets her hands on any Token, she's almost certainly going to be able to figure out what it does once she's had some time to study it.
Being able to cheat a Pledge, even if it's just for an hour, is a pretty scary ability, because the other person is, presumably, still bound by it. Quite appropriate for an Autumn monarch. It doesn't come cheap though, costing one Willpower
Dot.
You can run, but you can't hide. (•`_´•) If Cora wants to find you... well, it's not a guaranteed success, but knowing the right direction and approximate distance helps a lot. How long must you wait before the penalty for reinstating it does not apply though?
I'm sure being able to prevent a target from communicating is a fairly powerful if situational ability, but I don't know the settings involved well enough to know how useful this is going to be.
You become much harder to ambush, especially if you're a coffee addict. And Cora is already pretty hard to ambush with a Wits+Composure pool of 10. Oh, and she should be able to score an exceptional success on this fairly often, I think.
Hey, we just saw this used in KCS! (‾▽‾) Pretty useful if you couldn't get enough sleep for some reason. I don't think you get the Willpower recovery of sleeping though.
Another useful one for harvesting Glamour from emotions, and could probably be combined with Witch's Intuition for some sort of carrot and stick thing.
Emotion harvest again. And finding out why people are angry probably helps with getting them to calm down. Of course, it'd be much better if they didn't get angry in the first place, so if you're using it for this purpose I'm guessing something has probably gone wrong already. It's only the first clause though, and cheap, so that's not a huge issue.
A debuff to social rolls, to help with Cora's relatively mediocre social dice pools, perhaps?
This looks very similar to Heart of the Antlion. It's somewhat broader, applying to disgust as well as fear, and produces a more reliable penalty against supernatural effects (7, or 9 with exceptional success, which looks pretty huge), and its catch is much easier to fulfill (although the cost is low anyway. Her dice pool for it is significantly lower though.
Block a sword with your bare hands and not get injured by it until it's convenient for you, ie. when the fight is over and you have time to patch up your wounds. (‾ω‾)