Impossidron

Impossidron
The Impossidron is an infinite-dimensional shape that is impossible. Its Shläfli symbol is $$\{1,2,3,4,5,6,7,8,9,10 \cdots \omega\}$$. This symbol is impossible because of some weird math crap. It is in the Unvoid.

Why it's in the unvoid
Because somebody got tired of it sitting around and breaking geometric laws that they hacked into the matrix and set it's y-velocity to the number BiggestNumberEverFunction(Rayo's Number).

Impossidron $$\Omega$$
Oh no it's coming to break all our hypergeometrical laws that we worked so hard to figure out aaa run it's coming

Nobody knows what this looks like because it's outside of the box (trust me on this one) and it doesn't really exist but sort of does.