.shell
From WikiManual
.shell ----- This tells me how big my shell currently is. I can make more shell by storing a positive number into .mkshell and I can discard some shell by storing a negative number into .mkshell. Shell protects me from -6 (body) shots that steal my glorious size away from me but it makes me slow and bulky, much like a trilobite. Never heard of them!? Well, kids, Google is your friend. Now shell protects you from venom shots as well.