Can you have a mithral towershield? I know the entry for towershield says that it's made of wood, and that mithral only applies to things made primarily of metal.
But... consider why a tower shield is wood. Because one made of metal would weigh far too much, right? But one made of mithral would actually be lighter than one made of wood.
If you look at the worst case, a Heavy Wooden Shield weighs 10 lbs. and a Heavy Steel Shield weighs 15. That would (probably) mean that a Steel Tower Shield would weigh 45*1.5 = 67.5 lbs. Mithral weighs half as much, so you end up with a 33.75 lb. shield.
Calypso
But... consider why a tower shield is wood. Because one made of metal would weigh far too much, right? But one made of mithral would actually be lighter than one made of wood.
If you look at the worst case, a Heavy Wooden Shield weighs 10 lbs. and a Heavy Steel Shield weighs 15. That would (probably) mean that a Steel Tower Shield would weigh 45*1.5 = 67.5 lbs. Mithral weighs half as much, so you end up with a 33.75 lb. shield.
Calypso