The BBEG's plan may not involve Decanters of Endless Water in any way.
No, especially not if the plan also involves bunnies.
The BBEG may not create the custom item Decanter of Endless Lava.
I am not allowed to use Decanters of Endless anythings.
No, not even Decanters of Endless Fluffy Bunnies, nor Decan'ters of Endless Pizza.
Especially if I can't get the evil grin off of my face when I say it, due to the evil plan I have for it.