Stacking Large Weapons... how big does it hit?

[maouse]

OK. So I have a player who is asking about the fine effects of the following:

Gravity Clip and Lead Blades don't Stack.
Gravity Clip and Impact don't stack (presumably "similar effects").

And since Impact is basically Lead Blades made permanent on a weapon, I'd rule they don't stack. (though the oversight on Lead Blades doesn't mention it doesn't stack with itself, RAW error 101)

HOWEVER... Enlarge person + Titan Fighter (not Mauler) + Lead Blades effect = Gargantuan weapon category damage?

M wielding Large. Large wielding Huge. Huge weapon doing Gargantuan size damage? (6d6 with great sword or great axe)

Seems legit, and even get's a 10' reach for cleave/great cleave... 15' if they get lunge...

Do I have that correct? Is there another effect that stacks for size category or weapon damage category that we missed?

[James Risner]

This should help Weapon Size FAQ

[maouse]

3d10 goes to what? 5d8? That's the only not directly mentioned but would presume it doesn't go to 6d8... despite the implication. (Rail Gun, in case you are wondering what does 3d10).

[Casual Viking]

maouse wrote:

And since Impact is basically Lead Blades made permanent on a weapon, I'd rule they don't stack. (though the oversight on Lead Blades doesn't mention it doesn't stack with itself, RAW error 101)

There's a FAQ ruling, within the last few months: You can have ONE virtual size increase and ONE actual size increase. "Using an oversized weapon" is not a size increase.

[James Risner]

3d10 increases to 6d8

Casual makes the point I failed to mention, much of this doesn't stack.

[Cavall]

I'd also like to add rail gun and enlarge person doesn't stack. The moment it fires it will shrink, as per the spell.

[chbgraphicarts]

Large Weapon with Impact on a Medium character deals damage as a Huge Weapon.

Huge Weapon with Impact on a Large character deals damage as a Gargantuan weapon.

There isn't much more you can do past this - Giant Form II can get you to Huge size AND keep your gear identical

So a Gargantuan Weapon with Impact on a Huge character deals damage as a Colossal weapon.

If you can carry around a +1 Impact Gargantuan Bastard Sword and cast Giant Form II reliably, you can deal 6d8+1 damage per attack (although each attack receives a -2 Penalty due to being an inappropriately-sized weapon).

That being said, a Gargantuan Bastard Sword would weigh 48lbs. alone, so you'd have to have a freakishly high Str score.