I have a question concerning the weapon created by a warlock's Pact of the Blade class feature. What I want to know, and haven't not even been able to find being discusses, is this: When you created a weapon, say a rapier, what can it be made of? Can it be made of silver, cold-iron, adamantine, etc. I've looked and I've looked and found a ton of infor on other topics about the Pact of the Blade and it weapon, but nothing about what the weapon can be crafted from.