[Agema]

For that matter, should javelins (and boulders) have a break shield ability? They were used by Romans to penetrate shields and make them impossible to use. Presumably this would not work on magic shields.

For boulders, maybe make them Area 1 effect, but with a nerf of a Defence roll to dodge the huge, slow, heavy, incoming lump of stone. Or treat them like a melee blow where the shield can add protec but not negate the blow.