[Template] Do you know what's inside?

[Pie Guy]

When I first saw this thread, I instantly thought of The Rats in the Walls. Excellent reference, and very cool template; I'll probably end up using it in one of my campaigns sometime. Or, better yet, one of my PCs... I can see it now: half-elf bard in the walls. Hey, where's that eerie music coming from...

Wait, it's possible to read this and not get the reference?

Anyway, Zombies in the walls!

Edit:
"The zombies. The zombies they can never hear. The zombies, in the walls."