I feel like our next target for magic items, if that's what we want to spend on instead of other stuff, should probably just be something that helps us spam invisibility. Great as a panic button, great for infiltration, great for pranking, and having it as an item minimizes most of its weaknesses.
... Actually that sounds like a
great item to get.
A cloak of Invisibility, Illusion or Intangibility!
Most suggestions I see usually bring up stuff we have no idea if we'll use (the cure candle) or some kind of super-purchase like the speed-of-light thing (a
battle spell) which... eh, kind of leaves you feeling like there's probably a better way to do the killing anyway.
But "become sneakier"? That's both: something Mathilde does all the time, and; something straight out of the Ulgu spellbook, rather than another Wind of magic.
So maybe what we should be looking into, is what will make things easier for Mathilde, or what will make it so that she doesn't have to cast the Ulgu spells herself.
Moderately Complicated - Magic 3 required to learn, Magic 5 to cast reliably.
P / Cloak Activity: Allows you to perform an action while appearing to perform something entirely different for up to half a minute.
K / Mockery of Death: Causes someone you touch to act and appear dead for several days, or until you end it. They retain all their senses, including sight if their eyes are open, and will still need to breathe and drink.
K / Pall of Darkness: Creates an area of impenetrable blackness within short range that lasts for about a minute or so.
- This is impenetrable to you as well, even your Magesight.
K / Shroud of Invisibility: Makes you invisible for up to half a minute.
- No limitations. Attack, shoot, scream, do what you like, you stay invisible until it expires or is dispelled.
K / Throttling: Sends ropes of darkness a short distance to strangle the target. Lasts until you choose to stop or your concentration is broken.
- Without magical protection or supernatural toughness, the target is helpless from when the spell hits their throat.
Fiendishly Complex - Magic 5 required to learn, Magic 7 to cast reliably.
K / Illusion: You create an illusion at short range that can look, sound, and smell like anything you want. Requires near-constant concentration to maintain.
- Illusion will not be solid. If the illusion is implausible enough to raise suspicion, those subject to it might see through it.
K / Substance of Shadow: A single person or item that falls within a shadow becomes invisible, silent, and insubstantial, though they can selective choose to physically affect the world. Lasts until the item or character is illuminated.
And that's when I remembered that illusion has the rider of "
Requires near-constant concentration to maintain".
It's hard to keep it up and do other stuff at the same time. That means that if we can get a really good item of illusion, we can use that to cast the illusion, and do other spellcasting ourselves. Of course, the obvious issue might be that... as a Fiendishly Complex spell (one with an attached note talking about how it requires near-constant concentration to boot) it'll be very limited or low-duration as an item, or have other issues... whereas Invisibility is a tier down at Moderately Complicated.
But, if it
does work? That could simplify things for Mathilde, if she's trying to be sneaky but needs to cast multiple spells or keep multiple things going.
Also... Other possibilities include enchanted items of "Pall of Darkness." To get literal smokebombs. Or a hangman's rope, enchanted with Throttling; for those stealth kills.
You want some kind of "killer enchanted spell" for an Ulgu wizard? You should probably get something like "Throttling" or an Invisibility Cloak. Rather than Speed of Light. Get something that is suitable for your profession. i.e. Make your usual style more smooth and effective.