Basically, like in most arena deathmatch FPS games, an item/event that will give you a certain amount of armor.
It would reduce the damage taken by however much armor "points" you have on.
As you take damage, some armor decreases some along with some of your health.
And maybe a bar like the health bar addon, like above or below it.
Up to 100 or 200 armor.
/discuss
Offtopic:
I haven't played blockland in about a month or two. Yikes. That's a record for me.