Ooh! Toa of light! Neat.
But for those now knowing that Joske will not die: "Prevent user from accessing mask ever again" is an objective which can be achieved in more ways then one... Perhaps the destruction sewn in each man's heart will cause Joske to burn himself out?
Because, "Just not being able to use an OP weapon ever again" is not much of a weakness in itself. It gives you an advantage you previously not had, and even though it is a one-off advantage, later on losing the ability to give yourself even more advantages is not a sacrafice in itself (which is what the "Specify the weakness" would imply). Something tells me that Toa Joske will have another sacrifice to make very soon...
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EDIT:
Also, minor nitpicking:
THAT COLOUR. Srsly. Aargh! Couldn't you have gone for a more dark gold colour? Sure, this one looks stylish, but it is rather impractical (hard to read).
Also:
My duty as a Toa to protect the matron
Ok, ok, I fixed the coloring the best I could. Went from yellow to a dark orange. Should make the text easier to read without sending everyone into epileptic shock.
I see Heuani went out on a blind date with good ol' Mary Sue while I was gone.
-Tyler
Or more accurately, Marty Stu.
...Wake up, get ready for school, check BZ - wait, SINCE WHEN CAN THE MASK OF CONJURING DO THAT
This scene is more proof than ever that GMs really need to watch their loopholes, even when giving stuff to other GMs. I sense that Joske becoming a Toa of Light was not in the plan. 
Buuuuut I will say this: Tuck did a marvelous job of describing Joske's internal dilemma at the beginning of the post. Props for that.
Lol. Technically, if we're splitting hairs, it can't. Nuju and myself both know this. However. this battle planned out LONG in advance, including the masks used and the dance both charrie did. Granted, the details were as we wrote them but for all practical purposes everything went according to plan as was laid out weeks ago. That includes usage of the mask... for this single event. Not to mention the term weakness has many meanings and synonyms, including:
Synonyms:
infirmity - frailty - feebleness - debility - failing
So the fact that the mask will fail in the end, or perhaps even more unforeseen failings, the debility of the one wearing it, the frailty of containing all that power IS a weakness... but not a traditional one. Besides, I think VF summed it up perfectly:
And Heunai's use of shadow-powers was not bending the laws of physics? Shadows becoming physical, shadows used to counter pretty much all the elements was pretty much doing that as well, plus a mask to turn the opponents element against themselves.
Light is just special in the way that it is the counter-point to shadow, which doesn't exactly play by the rules either, so there isn't really an issue there.
Not to mention he has in essence mind control powers, Mask of Charisma powers, immune to a whole host of other abilities... just leveling the playing field, that's all
This is why it's on the Banned Mask list. It can make a mess of all sorts of things, but in all honesty one of the few devices that could bring Heuani down to a more manageable level. And besides... it makes for a good story. Isn't that why we play this game?
To make a good story? 
We play in a game where physics-defying powers are smelted into masks, being control the very elements of the universe, and death rarely happens. The whole game is a suspension of disbelief no matter what we tell ourselves are the rules we put into play; this is why I have always tended to be on the more lenient side when it comes to abilities. In the end the only question you need to ask yourself is this: was it a good story? Did I have fun?
If the answer is "Yes", then you understand why this forum exists. Why I do what I do. Over-the-top? At times, yes, I admit, I'm a bit showy. But that's why there are tales and legends of heroes and knights and dragons and wizards. You'll remember it for a long time afterwards. Which is the point. Entertainment. Excitement. Fun. That's why we're here.
On to other issues, that brilliant flash of light? Toa Maru, that's your cue. So Rene, time to get your collective company's butt in action and mosey on over to Kini-Nui so your team and get the mask and show Makuta what a team of heroes can REALLY do.
You guys have a date after all
Mr. M is awaiting. Don't be late!
