Determining Larger than Large Weapon Damage

[Sophelios]

Ok, so my DM is running a campaign where arcane magic is at least heavily frowned upon, if not outright illegal, and psionics are the norm. As such, he's allowing a lot of stuff that may or may not be official. But here's the gist of my problem.

One class, the Soulknife, can create its own size appropriate weapons. Another, called an Aegis, has a similar mechanic for armor. And of course there's a prestige class that combines the two. At creation, a soulknife chooses whether they want to make light, one-handed, or two-handed weapons. They can pick up a skill to allow them to make any they want, but otherwise, at creation they're stuck with that choice. The aegis, through certain armor customization, can increase their size by two categories.

My plan is this. I want to make a Half-Giant, which get the racial Powerful Build, allowing them to use weapons one size-category higher than they are. With the Aegis class, I will be able to make myself Huge, thus enabling me to use Gargantuan Weapons. As a Soulknife, I can make weapons appropriate to my size.

Long story short, I need to know how to convert a Medium 2-handed weapon that does 2d6 dmg, into a Gargantuan Weapon.

[golem101]

IIRC, the chart is pretty much this one:

1 -> 1d2
1d2 -> 1d3
1d3 -> 1d4
1d4 -> 1d6
1d6 -> 1d8
1d8 -> 2d6
1d10 -> 2d8
1d12 -> 3d6
1d20 -> 4d6

So, let's see.
2d6 (medium) -> 2d8 -> (large) -> 4d6 (huge) -> 4d8 (gargantuan)

[Sophelios]

Thank you very much. I especially appreciate the quick response.

[Highglander]

I didn't find a rule specificaly for the manufactured weapon's damage. However there is one for natural attacks.

Now I use hero lab, add the wanted weapon with the wanted size and it gives me the damage dices. Until now the damage given seemed coherent with the improved natural attack feat.

For a greatsword I have :
2d6(M) => 3d6(L) => 4d6(H) => 6d6(G) => 8d6(C)

[Bart Vervaet]

I seem to remember that an increase in size results in 1.5 times the damage (closest fit). Can't find the official reference right now though.

so 2d6 (M) would become 3d6 (L) would become 3d8 (H) would become 6d6(G)

Basically, if you can multiply the number of dice by 1.5, you do this. If you cannot, you increase the dice type as per the table in the CRB (small and large weapons) and keep the number of dice the same

so 1d6 becomes 1d8, but 2d6 becomes 3d6 (not 2d8)

hope this helps

grtz

Bart

[Highglander]

Quote:

so 2d6 (M) would become 3d6 (L) would become 3d8 (H) would become 6d6(G).

3d6*1.5 = 4d6. Which seems accurate according to the storm giant's greatsword that deals 4d6 dices of damage.

I can't make the 1.5 rule compute with the damage hero lab gives me on colossal :(.

here are the values in hero lab (yes I added twice the large one :p)