How can I gain more uses of a specific natural attack (or pair of natural attacks) in a turn?

Question

I'm building around using the 3.5 Eldritch Claws* feat for my Warlock, which count as a pair of natural attacks added to the damage your Unarmed Attack deals. I would like to gain more attacks with these, how can I go about doing this? Thus far I know of spending 3 feats and getting only a single additional attack (Improved Unarmed Strike, Feral Combat Training, and Snap Kick), and I'm likely to take that since it seems like I'll have feats to spare, but it's still a steep cost for just one extra attack.

The game I'll be using this build in is a heavily houseruled Pathfinder game by the way, which allows all official content from 3.0/3.5/PF as well as Dreamscarred Press material. Other 3rd party and homebrew material may be approved on a case by case basis.

*Eldritch Claws is a feat found in Dragon #358 pg87

Answer 1

Rapidstrike and Improved Rapidstrike give claws pseudo-iteratives

The Rapidstrike and Improved Rapidstrike feats from Draconomicon allow claws to be used more often in a single full-attack. In addition to high BAB requirements (+10 and +15 respectively), they require that you be one of the following types:

• aberration
• dragon
• elemental
• magical beast
• plant

There are LA +0 options for aberration (elan) and dragon (dragonborn, dragonwrought kobold, spellscale; all Races of the Dragon), but I don’t believe there are for elemental, magical beast, or plant. There are numerous ways to obtain these types after the fact, but most are very expensive.

Beast Strike allows you to add claw damage to unarmed strikes

Beast Strike from Dragon vol. 355 allows you to add the damage of a claw attack to an unarmed strike attack. This is otherwise a normal unarmed strike, i.e. you can use it for whatever attacks you like, you can Flurry with it, and so on.

Because Eldritch Claws base their damage on your unarmed strike damage, and then you add the Eldritch Claws’ damage on to your unarmed strikes, you effectively double your unarmed strike damage when you do this. And because it’s not really doubling (just adding the same thing twice), it is multiplied, e.g. on critical hits, rather than 3.5’s usual multiplier-addition.

But also note that Beast Strike is a rather poorly-written feat that causes a fair amount of confusion. We have a couple of questions on it as it is:

• Does Beast Strike add Strength to damage twice?

• How does Beast Strike interact with a monk with natural attacks?

The answers to both questions is we can’t say for sure because Beast Strike is a rather confusing feat. That said, confusing though it is, it’s a good feat, and I don’t mean that it’s super-powerful. It’s a reasonable buff to a certain niche build, and I think it improves the game for it to exist, even if you do have to houserule a few things in because the feat is vague.

Answer 2

Action points (also seen in Eberron) let you do this, albeit at only once per round unless you can convince your GM to remove that restriction.

Answer 3

I can only answer with regards to Pathfinder. The Speed weapon ability will grant you an extra attack. This will require a +3 Amulet of Mighty Fists. Also, while not entirely applicable to you, if you somehow become an animal companion and don't enough natural attacks for its modified Multiattack, you gain an iterative attack with your natural attack. Since you're playing a heavily modified version of Pathfinder, it wouldn't be unreasonable to work that the actual Multiattack feat works just as the one on the Animal Companion chart.