I was reading my copy of Ultimate Equipment, when I stumbled upon the "Impact" weapon special ability, and it got me wondering. Do effects that say that a weapon deals damage "as if it was one size category larger" stack? For example, were I to use the Impact weapon ability, the lead blades spell, a Belt of Thunderous Charging, and the enlarge person, which of these would stack?
I've got a dwarven Samurai(Ronin)/Forgemaster Cleric player wondering if it works.
If it's already been answered, sorry, but couldn't seem to find a reference to this specific problem in the forums.