And if you have to nerf something in play, then it's undercosted.

I prefer to think of it as not nerfing the enemies tactical abilities.  Even a really, really stupid person could figure out "get where they can't shoot you from way up there until you can find a way to even the odds"

It's possible that Spider Walk just sucks, but it seems to me more likely that Wings is a touch too good.

Nah, one's just better indoors and one's better outdoors.  Truthfully, they're both pretty useless.

I mean, it's not gamebreaking or anything. Just a little too inexpensive.

It's only inexpensive if everyone you fight is too dense to come in out of the rain.  If that's the case, it's not the power's fault but the GM's.

"Not a Crown Royal sock?  Odd but I guess it works too."

Wow that takes me back - I wonder where that went? It was my best dice bag ever....

I swear you could use one of those as a focus item and kill off 70% of gamers worldwide at once.

Well, the Knight wasn't at the last session where they aquired the book.  I'm not sure what response she'll give, but it probably won't be the "let's get as far away from this as we can and just worry about covering things up so the Wardens don't kill us" tactic that the rest of the PCs are leaning towards.  I see her caring about things like "where did this woman get the evil book, and who else has it?" (As in I think I'll be compelling her to that) Which requires digging, and that digging could draw the attention of the Wardens.

Smooth, that's even more paranoid than necessary.  Toss the book to the Wardens and give them the complete rundown would be the best solution.  Might even get them a freaking medal or a Dennys gift certificate or something, depending on if their social skills are good enough to get the Wardens to believe them completely.

As for the Knight, if that's how he goes then all he has to do to remain clear is inform the Wardens and Senior council that he's going to continue looking into where the book came from and if there are any copies or similar works still floating around.  Knights carry significant political weight and their motives are usually above reproach, or at least as near as is possible when dealing with political figures.  They're also generally considered not to be under the Council's authority, even if they aren't signed on to the Accords.

I think you're barking up the wrong tree.  Sorry, couldn't resist.

Wait, I must have glossed over the Knight bit.  That is absolutely begging for a compel on his High Concept;  likely one every time it's discussed.  If he's in any way willing to risk all of creation over acquiring power and continue down this path, he needs to lose Righteousness at the very least and likely most/all of the rest of his template abilities and his IoP.  Anything else would effectively be saying TWG in your campaign is fine with one of his servants trashing the universe.

I think you're drawing an unnecessary parallel between the way an enchanted item works (like Harry's rings), and a thamaturgical spell.

The Enchanted Item is powered by keeping back just a little bit of motion every time Harry so much as twitches.  This energy is stored, and then released all at once.

Thameturgy takes a while to cast, and the effect draws all the power from the act of casting itself.

So in this case, there's no need to generate a pile of bad luck to match your good luck.  All the generating happens during the casting of the spell... the spell energy is converted to Good Luck (or whatever).

You're right of course.  I was thinking from the wizard I play's perspective and he's far too paranoid to chance it adding entropy to him or his surroundings accidentally.  He doesn't believe it, so he can't do it that way.

The PCs took out someone with Sponsored Magic (Old Ones).  There was some residual backlash from her death curse which basically left a scene aspect of "Warped by Old Ones magic".  They also have her book, which is both an instruction manual on how to get her Sponsored Magic, and acts as a focus.  They are really, really paranoid about what to do with the book, and I'm curious to see how they'll clean up the mess.

Oh man, if they're anything like me and mine, they're about to get killed to death.  You might want to consider preemptive Warden intervention or let them start catching a glimpse now and then of a gray cloaked figure watching them from a distance.

Flying implies considering 3d zones and falling damage calculations. If the player risks the GM keeping score of all that, he should expect to die Seriously, warning a player sounds like "I am limiting how much fun you have due to ambiguous rules".

More like warning them ahead of time not to get cocky and think it makes them invulnerable so they don't piss and moan if gravity kicks their ass.  I'd feel a bit of a dick doing it without warning but I have no problem burying someone's character because they did something astoundingly stupid after I've given them a heads up on possible consequences.   YMMV