Bad Eggs
by Mark Gottlieb
Answer: DIE
Solvers must build the 10x10x10 cube out of the eight 5x5x5 octants. When fully assembled, the eggs on the external faces of the 10x10x10 area form the pips of a DIE, which is the Sandcow's directive to you. Here's the full grid, taken in slices from all three orientations.
The cryptogram cipher is:
M=9, N=2, P=11, Q=7, R=3, S=8, T=10, U=5, V=6, W=1, Y=12, Z=4