In addition to what The Warlock posted, you are making an assumption that people with the means to do so actually want to depose the emperor.
You only need one.
There are definitely historical examples of societies where the people of a powerful ruler believe in that ruler so much they will pretty much accept whatever they decree.
There are definitely historical examples of societies where the people of a powerful ruler did not believe in that ruler so much that they would pretty much accept whatever he decreed.
My assumption is that this is one of those societies; the people love the emperor as a god.
Wizard: Hm. I have an Int of 32. I wonder what happens when I start thinking about the status quo?
*one Int check later*
Wizard: Now, if I planar bind the Nightmare, I can then go Etheral. The only think that could stop me would be Walls of Force, but those can be disintegrated. Guards can be bypassed with Superior Invisibility. Magical traps can be suppressed with an Antimagic Field sculpted to excluse my person. Speaking of them, appearing in an Antimagic field could be a bother, but that's what Invoke Magic was designed for... (and so on and so on)
Also, the assumption in the prisoner statue suggestion is that it isn't a single mage with the ability to cast enough 6th level spells to turn a sizeable portion of the criminal population to statues, but rather a large number of mages all working for the Emperor. Perhaps working together they might have enough power to depose Him
I could probably do it with one.
but if He has enough power to fritter it away on projects like this
That's my question. What's his power?
it is equally likely that He has enough power to stop them as well.
So far no indication has been given of any way to stop a rogue mage from changing the status quo. (Incidentally, this was part of the reason I posted earlier.)
Fabricate and stone shape still requires you to make an appropriate craft check. The most life-like statue will be one of a live person. Not many mages seeking power or prestige focus on Craft: Sculpting.
Aid Another can be used on Craft checks, and it's easy to get 10 or so competent sculptors around for a +20 bonus.
Alternatively, use the retraining rules in the PHB2 to reallocate skillpoints.
Easier than obtaining a ton of 6th level spells at any rate.
Between charming monsters with stoning abilities and metamagics which increase the number of targets of a spell
If you can Chain Flesh To Stone, a
9th level spell, the same level as Time Stop, Shapechange, and
Win the Freaking Game, you've long since stopped taking orders from idiots.
Also, just because the emperor is a potentially inbred, decadent, dissociative incompetent doesn't mean he isn't protected.
\ I'd like to see a plausible explanation for what's keeping him alive that is preferably not DM fiat. So far people have been saying "No, you can't dispose of him, he's protected", but the only actual, concrete things keeping him protected the fact that people believe, and protective magical items and etc none of which are really explained.
And people believing is a horrible protective mechanism because there are always dissenters.
There needs to be a good explaination of how he is protected, otherwise the entire setting has a glaring plot hole in the middle. Kind of like a doughnut.