[ArchonShiva]

Not expensive for arrows? It halves damage!
Changing imp to (2)pi is a game changer but *probably okay*. I’d make it the same price as Fine, thieves and swashbucklers will be all over it, and probably knights, too.

Adding a (2) divisor to cr, imp and cut damage weapons is potentially gamebreaking. Since armor divisor is multiplicative, this is roughly the equivalent of something that should cost $30k as an enchantement, which is to say, adding a penetrating Penetrating (2) enchantement for $5k will result in armor divisor (4). I would advise against this, but would get it on everything if it were allowed.