Infiniti2000 said:
I don't agree since it depends on the weapon.
You don't agree with the process, or you don't agree with the conclusion?
Considering I never offered a conclusion, you must be disagreeing with the process.
If I had a slam attack and a dagger in my hand, can I still slam if I decided not to make a dagger attack, without dropping/sheathing the dagger?
Hence, "So, step 1 would be to determine how that creature gets its natural weapon attack."
If you decide that you need a hand free in order to perform a slam attack, then you can't slam if your hands are busy. (Dagger in hand = no slam attack with that arm.)
If you decide that you need only not attack with a particular limb in order to perform a slam attack, then you can't slam if you used that limb for something else. (Attack with dagger in hand = no slam attack with that arm.)
I'd have no issue if a DM said, "In order to use your slam attack, you must have your hand free." I'd similarly have no issue if a DM said, "In order to use your slam attack, you can't attack with that arm at all otherwise." I'd similarly have no issue if a DM said, "In order to use your slam attack, you just have to describe it appropriately based on how you're currently fighting."
IMG, I decided that a warforged didn't need any hands free in order to use his or her slam attack.