| Kierato |
Striking
When wielded by a character proficient with it's use, a weapon with the striking property deals damage as if it were one size category larger (ex; Long sword becomes 2d6). This does not change how much effort it takes to wield this weapon.
Strong Transmutation; CL 10; Craft Magic Arms and Armor and Enlarge Person; Price +2 bonus
What do you think?
| Knight who says Neek! |
Increasing it +1 size only increases the random damage by 2 at most at smaller dice sizes (such as 1d6 Shortswordn to 1d8 short sword). So I wouldn't make it a +2 ability for smaller weapons as you would only be getting +2 more at most and then it is random unlike a standard +2 enhancement which is +2 all the time. Your example of a longsword would be a different matter, since you could do up to +4 more but again it is random.
So split it into lesser Striking (medium and smaller melee weapons) as a +1 abiilty, and Striking as a +2 (larger or greater melee).
Actually, you would probably be better off making it an add on magical ability that is not tied to the usual +1, +2 etc. ability.
Maybe make it a form of alchemical metal that costs +1500 for medium or less, and 2250 for large or greater weapons.
NotMousse
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Races of the Dragon had a spell called Mighty Wallop, the weapon did damage as if it was +1 size category.
There was a higher level version called Mighty Wallop (Greater) that was +1 size category / 4 levels (max +5).
There were also mercurial weapons, which had a bit of mercury in them causing them to hit as one size larger. I believe it was limited to the bigger weapons such as greatsword, and required an exotic proficiency to wield.