Crack it open and it looks like a brain But when zombies come brain hunting It's your first line of defense

No mouth but I speak, no ears but I am heard, no body but I'm alive

I dance but i dont live, im wild but im contained, what am i?

I carry you though I never walk, I face the ground but never talk. I wear down slowly day by day, While helping you along your way.

A dapper half-moon perched upon the ledge, granting both clarity and style.