In my current campaign, the PCs are up against a technologically advanced foreign Empire – one of their main advantages is “grey steel”, which is harder and lighter than regular steel. For example, their soldiers fire “grey steel” crossbow bolts which have piercing 2 (the players got their hands on some of this ammo, they now have piercing 2).
Now here’s my question: What qualities should “grey steel” armor have? Reduced weight? Increased armor? The thing I’m really unsure about is whether they should negate the piercing effect of grey steel bolts. Seems like something unusual in DW, but it could be fun.
Players, DMs… What do you think?