Barrels

Add an barrel, what works like an crate but only with 2x3 storage

If barrel will be filled with some heavy mats like stone it will can be rolled to crush your enemies like a boulder but more powerfull. If put in it bombs and roll it, it will explode in the end of roll, if put fire arrows, bomb and wood in it, it would explode in fires in the end of roll

Rolling barrel is simple: hit it with sword or pick axe, or even an arrow, it will start roll, stronger hit - better roll

Why do it must exist?
Be an better, but very expensive boulder