I thought of this because old pb had purchasable items with pb points or whatever and one of those purchasable things was an RPG launcher. So mortar would relatively be the same thing. It will launch a slow flying ghast Fire ball that explodes on impact releasing a bunch of snowballs in different directions for massive coverage. Each snowball would do one damage and the recharge to use mortar again would be rather slow.
Technically, Mortars Are A High Angular Cannon That Shoots Projectiles At An Angle Into The Air And Fall Back Down Landing On It's Target. So The Ghast Ball Would Have To Go Up And Down. Just Saying...
Nah, I'll just make it shoot straight. Which item should be used? We have wooden and stone shovels left.
Probably 15-22 snowballs flying in the 360 degree spectrum. The recharge should be 2 seconds longer than shot gun or something like that.