All the stackable ways to increase weapon damage size

[forger03]

I'm trying to hunt down all the spells, feats, magic items, weapon enhancements, etc that increase base weapon damage size.

I am NOT worried about the charts.

We have always gone 1d2, 1d4, 1d6, 1d8, 2d6, 3d6, 4d6, 6d6, 8d6, 12d6, 16d6, 20d6 etc...
and 1d10, 2d8, 3d8, 4d8, 6d8, 8d8, 12d8, etc... and we've handled alternative dice (like 2d4) by switching them for their equivalent in single dice (2d4 becomes 1d8 when figuring out its next die step)

What I know of so far:
Spells: Strong Jaw (only affects natural weapons), Lead Blades (melee), Gravity Bow (ranged)
Feats: Improved Natural attack
Weapon Enhancements: Impact

Alternatives: Giant Forms, Righteous Might, Enlarge person (it DOES get at least one increase in base size, even if they don't stack with each other).

Does anyone know of any others, or will my players and I simply have to get creative with our magic item creation and base spell usage?

[tkul]

Oversized weapon - +1 size
Enlarge Person - +1 size
Impact Enchantment - +1 size
Giant Form I/II - +1/2 size
Righteous Might - +1 size

This is probably the best stacking you can get. But getting giant form and righteous might going at the same time is going to quite a trick

[Archaeik]

Polymorph wrote:

You can only be affected by one polymorph spell at a time. If a new polymorph spell is cast on you (or you activate a polymorph effect, such as wild shape), you can decide whether or not to allow it to affect you, taking the place of the old spell. In addition, other spells that change your size have no effect on you while you are under the effects of a polymorph spell.

So you can have 1 Polymorph or transmutation size adjustment

+ any others you can manage to stack

other RAW issues

Improved Natural Attack wrote:

Benefit: Choose one of the creature's natural attack forms (not an unarmed strike). The damage for this natural attack increases by one step on the following list, as if the creature's size had increased by one category.

Strong Jaw wrote:

Laying a hand upon an allied creature's jaw, claws, tentacles, or other natural weapons, you enhance the power of that creature's natural attacks. Each natural attack that creature makes deals damage as if the creature were two sizes larger than it actually is. If the creature is already Gargantuan or Colossal-sized, double the amount of damage dealt by each of its natural attacks instead. This spell does not actually change the creature's size; all of its statistics except the amount of damage dealt by its natural attacks remain unchanged.

I haven't seen an official ruling that these stack, so expect table variation based on the wordings.

Lead Blades does not stack with Impact FAQ

From both Enlarge Person and Righteous Might

Quote:

Magical effects that increase size do not stack.

[tkul]

Edit: didn't see the exception. Can still get size +4 with oversized weapon, impact, Giant Form 2

[forger03]

I'd house rule otherwise on impact and leadblades. The requirements for impact use the word "OR" meaning Lead blades does NOT have to be the spell used to add Impact. So I'd house rule, personally that they can stack as long as you don't use lead blades as the base for impact.

Oversized weaponry, lead blades/impact/enlarge person or giant form 1/2/3(is there a 3?) seems thus far the best way to make really big weapons without houserules and conversions from 3.5 (mighty wallop anyone?)

Thank you to those who have already replied, if anybody knows another method, please feel free to mention it!

[saucercrab]

Here ya' go, another source for +1 weapon size: the Celestial Obedience feat, with Falayna as a patron (Chronicle of Righteous, pages 5 & 12): At 16th level/HD, you can increase your weapon's damage die +1 for your HD in rounds per day. Swift action to use, can be used in 1 round increments.

I have a build using the aegis from Dreamscarred Press, using some of the mentioned options, to be able to do colossal damage as a medium creature:
1. Aegis with the Powerful Build customization at first level, to be able to wield a large greatsword (3d6 base damage).
2. Take the Augmented Weapon customization at 6th level (+1 weapon size = 4d6).
3. Impact weapon ('nother +1 weapon size = 6d6).
4. Celestial Obedience: Falayna feat taken prior to 16th level (+1 weapon size for 16+ rounds per day = 8d6).

As far as I can tell, it should all stack.

[Allycard]

one of the titan archtypes (+1 size). tiefling with fiendish heiritage feat (may want to consult dm to see if you can skip the roll and just take one) to get you large limbs (+1 size) perminancy enlarge person (+1 size) impact (+1 size) this sets you up for 8d6 with mythic you can use enlarge person mythic to push it to 12d6 i recomend going with vital strike after all of this. best way to improve the damage for the build.

[James Risner]

You may only have two now:

• Size Changes, Effective Size Changes, and Damage Dice Progression
  
• Size increases and effective size increases

[Snowlilly]

Synthesit -> Huge Size
Enlarge Person -> Gargantuan
Strongjaw -> Colossal +1

or

Synthesist -> Huge Size
Enlarge Person -> Gargantuan
Oversized Weapon -> Colossal
Impact Weapon -> Colossal +1

Without the Sytnthesist archetype the summoner can directly take the Large evolution.

Large Size
Enlarge Person - > Huge
Oversize Weapon -> Gargantuan
Impact -> Colossal

[Abraham Z.]

Shillelagh

[James Risner]

Snowlilly wrote:

Synthesit -> Huge Size

Enlarge Person -> Gargantuan
Strongjaw -> Colossal +1

or

Synthesist -> Huge Size
Enlarge Person -> Gargantuan
Oversized Weapon -> Colossal
Impact Weapon -> Colossal +1

Without the Sytnthesist archetype the summoner can directly take the Large evolution.

Large Size
Enlarge Person - > Huge
Oversize Weapon -> Gargantuan
Impact -> Colossal

Synthesist won't stack with

Quote:

Enlarge Person: Multiple magical effects that increase size do not stack.

Taking the Large Evolution also won't stack:

Quote:

These bonuses and penalties replace, and do not stack with, those gained from becoming Large

The Oversized Weapon and Impact Weapon will not stack, you may only have one virtual size increase and one actual size increase. Per FAQ I liked above.

[Snowlilly]

James Risner wrote:

Synthesist won't stack with

Quote:

Enlarge Person: Multiple magical effects that increase size do not stack.

The evolution sets the base size of the eidolon/summoner. It is not a magical effect: the quoted rules text is not applicable.

All other effects stack with the evolution because it is an EX ability that sets the creatures base size. It is neither a magical effect altering creature size nor is it an effective size increase.

Quote:

Taking the Large Evolution also won't stack:

Quote:

These bonuses and penalties replace, and do not stack with, those gained from becoming Large

The correct RAW from Enlarge Person

Enlarge Person wrote:

This increase changes the creature’s size category to the next larger one. The target gains a +2 size bonus to Strength, a -2 size penalty to Dexterity (to a minimum of 1), and a -1 penalty on attack rolls and AC due to its increased size.

No mention is made regarding the targets size prior to being affected by Enlarge. The RAW grants a specific set of stat adjustments regardless of the targets new size.

Quote:

The Oversized Weapon and Impact Weapon will not stack, you may only have one virtual size increase and one actual size increase. Per FAQ I liked above.

Oversize Weapon = the weapons original, unmodified size. E.g. Amari and her large bastard sword. There is nothing virtual about it.

[James Risner]

The Large Evolution has rule inside that doesn't stack with becoming large other ways, so being Ex doesn't matter.

Plus things like spiked shields are Ex abilities and don't stack.

[Gallant Armor]

James Risner wrote:

Snowlilly wrote:

Synthesit -> Huge Size

Enlarge Person -> Gargantuan
Strongjaw -> Colossal +1

or

Synthesist -> Huge Size
Enlarge Person -> Gargantuan
Oversized Weapon -> Colossal
Impact Weapon -> Colossal +1

Without the Sytnthesist archetype the summoner can directly take the Large evolution.

Large Size
Enlarge Person - > Huge
Oversize Weapon -> Gargantuan
Impact -> Colossal

Synthesist won't stack with

Quote:

Enlarge Person: Multiple magical effects that increase size do not stack.

Taking the Large Evolution also won't stack:

Quote:

These bonuses and penalties replace, and do not stack with, those gained from becoming Large

The Oversized Weapon and Impact Weapon will not stack, you may only have one virtual size increase and one actual size increase. Per FAQ I liked above.

Wielding an oversized weapon isn't a size increase, it just sets the base size as large.

Also, using Bashing with a shield would be better than Impact.

If you play a Shield Champion Brawler you get some nice shield abilities as well as close weapon mastery which lets you swap out the "base damage" of a weapon with brawler level-4 unarmed damage. Depending on interpretation on if size increases would increase "base damage" this could bump your damage up to 16d8 at level 16 if you take the half-orc's FCB and get Monk's robes.

Add in Greater Vital Strike and you have 64d8 damage on a single attack.

[Snowlilly]

James Risner wrote:

The Large Evolution has rule inside that doesn't stack with becoming large other ways, so being Ex doesn't matter.

Plus things like spiked shields are Ex abilities and don't stack.

Large Size wrote:

An eidolon grows in size, becoming Large. The eidolon gains a +8 bonus to Strength, a +4 bonus to Constitution, and a +2 bonus to its natural armor. It takes a –2 penalty to its Dexterity. This size change also gives the creature a –1 size penalty to its AC and on attack rolls, a +1 bonus to its CMB and CMD, a –2 penalty on Fly skill checks, and a –4 penalty on Stealth skill checks. If the eidolon has the biped base form, it also gains 10-foot reach. Any reach evolutions the eidolon possesses are added to this total. The eidolon must be Medium to take this evolution. The summoner must be at least 8th level before selecting this evolution.

If 6 additional evolution points are spent, the eidolon instead becomes Huge. The eidolon gains a +16 bonus to Strength, a +8 bonus to Constitution, and a +5 bonus to its natural armor. It takes a –4 penalty to its Dexterity. This size change also give the creature a –2 size penalty to its AC and attack rolls, a +2 bonus to its CMB and CMD, 10-foot reach, a –4 penalty on Fly skill checks, and a –8 penalty on Stealth skill checks. If the eidolon has the biped base form, its reach increases to 15 feet (10 feet for all other base forms). Any reach evolutions the eidolon possesses are added to this total. These bonuses and penalties replace, and do not stack with, those gained from becoming Large. The summoner must be at least 13th level before selecting this option.

The ability increase evolution costs twice as much (4 evolution points) when adding to the Strength or Constitution scores of a Large or Huge eidolon.

Emphasis mine on the relevant rules text.

1. The large evolution cannot be taken by eidolons/summoners that are not medium size, e.g. small eidolons, gnomes, ogres. No RAW exists barring subsequent size alterations after the evolution is taken.

2. The stat modifications granted by the evolution replace the standard stat modifications for large size.

3. Spiked shields were ruled to work the same as shield spikes, which are a virtual increase to the damage die. There is no similar ruling in place for the Large evolution, which changes the physical size of the creature.