Can an eidolon's weapon be PART OF the eidolon?

[Ben Ehrets]

If I follow correctly, I can buy limbs with hands for an eidolon. I also need to take care of weapon proficiency one way or another. And I know eidolons can have equipment that appears and disappears with them. But is there a way for a weapon to actually be part of the eidolon?

This is mostly a fluff thing. I understand it might be more practical to just equip the eidolon with a manufactured sword which it holds onto. It's just important to the story that the eidolon is one with the sword.

What is the practical difference? I'm not sure. I guess it means the sword can't be enchanted like an item, but on the other hand it can't be destroyed either. Maybe it can't be disarmed?

Should/can this be purchased, or am I looking at probable hand waving?

[Sysryke]

Depending on the mechanical effects you are wanting to achieve; the answer is either going to be "no" or "yes, because it's just flavor". If you want the eidolon to gain the benefit of itterative attacks (those that scale based upon base attack bonus), or you wish to be able to place weapon enchantments upon said weapon, then the answer is no. If however, you just want a sword or pick or something to be growing out of the end of the eidolon's limbs, then go ahead. Purchase an appropriate natural attack evolution with your points, and describe it however you like. Any spells or enchantments that improve natural attacks will work, it will just "look" like a manufactured weapon. The appearance of your eidolon is pure flavor at your discretion. Only thing you may need to check is if you are trying to get a functional hand capable of full human-like manipulation on the same limb as what is basically a flavored claw. Not sure if you can do that. Not at home to check the books.

[Lelomenia]

There are a number of archetypes that do this, but eidolons don’t get class levels so that isnt an option.

There’s also some physical augmentations that exist that probably aren’t quite as ‘weapony’ as what you are looking for: fleshcrafting, necrografts, demonic implantations, etc. Permanent physical alterations that implant ‘weapons’ into limbs.

Two options that i think you may find worth looking at are construct modifications. The first, Weapon Modification, won’t be RAW legal for any Eidolon (except arguably an Inevitable, and there the argument is weak), but at least it provides rules/costs etc for how it would work if you want to work with your GM. The other Construct Modification is Construct Limb, which appears to be legal to put on your Eidolon, with the downside that it isn’t a permanent graft. But a Graven Guardian or Animated Greatsword arm seem worth considering.

[Ben Ehrets]

Helpful, thank you.
Mostly I wanted to be sure I wasn't missing something semi-obvious.

[Ghostwheel]

I think that you can flavor it however you like. But it should be treated as a slam, not a claw or whatever else.

[Derklord]

Ben Ehrets wrote:

But is there a way for a weapon to actually be part of the eidolon?

This is mostly a fluff thing. (...) It's just important to the story that the eidolon is one with the sword.

"The eidolon takes a form shaped by the summoner’s desires." That means the ends of any arms it possesses can RAW look like a sword (you'd still need an evolution that grants a natural attack with it, and it wouldn't count as a manufactured weapon for anything).

As a GM, I would let the Eidolon take a special version of the Weapon Shift feat, either as a feat or as a evolution. Including qualifying for the Improved and
Greater versions.

Ben Ehrets wrote:

I understand it might be more practical to just equip the eidolon with a manufactured sword which it holds onto.

Natural weapons are vastly superior to manufactured weapons when it comes to eidolons.