Ok... the Alchemy Handbook introduced grafts [source], more specifically fungal grafts. One of them is the Reaching Vines, which essentially gives you two vine attacks that deal no damage, but can be used to pull opponents in.
What if I could weaponize them even further?
Here are homebrewed feats that use the Reaching for more potent effects.
Whipping Vines
You have learned to use your vines as effective weapons.
Prerequisites: Fungal-grafted (Reaching vines), base attack bonus +2.
Benefit: You can use your vines as primary natural attacks, dealing 1d4 plus your Strength modifier. You can still use the pull maneuver instead of dealing damage if you wish.
Normal: The vines deal no damage and are used as secondary attacks.
Special: This feat counts as Whip Mastery for the purpose of feats, prerequisites and such.
Grasping Vines
Your vines can tighten your grip on objects you held.
Prerequisites: Fungal-grafted (Reaching vines)
Benefit: You can wrap your vines around your hands and objects you currently hold. This grants you the same benefits and properties of a locked gauntlet, with the exception that you cannot make lethal unarmed strikes. You can wrap only one of your vines around one of your hand if desired, such as to hold a one-handed melee weapon, but you can also wrap both vines to grasp a two-handed object, doubling the bonus to your Combat Maneuver Defense. Wrapping one vine is a move action and wrapping both vines at once, be for one or two objects, is a standard action. Unwrapping either or both vines at once is a move action.
Normal: The vines cannot be used to lock your objects in hand.
Special: If you possess the Quick Draw feat, you can wrap one vine as a swift action or both as a move action, and unwrap them as a swift action.
Flailing Vines
You can wield a weapon like a long flail using your vines.
Prerequisites: Fungal-grafted (Reaching vines), Grasping Vines, base attack bonus +6.
Benefit: After wrapping a weapon with one or both vines, as a free action, you can choose to release it and use it similar to a flail. Your weapon attacks gain reach. If the weapon already had reach, add 5 feet to your reach. You can snap the weapon to your hands as a move action. You cannot use the pull maneuver while wielding a weapon in such a manner nor can you hold another object while the vine is extended.
Special: If you possess the Quick Draw feat, you can snap the weapon back as a swift action.
Rapid Vines
You have learned to use your vines as fast as any weapon.
Prerequisites: Fungal-grafted (Reaching vines), Whipping Vines, base attack bonus +6.
Benefit: You can use your vines to make iterative attacks. The vines are treated as light weapons and you can use both at the same time, but doing so occurs all the usual penalties from wielding two weapons, including adding only half of your Strength modifier to an off-hand attack.
Versatile Vines
You have learned to use your vines for various maneuvers
Prerequisites: Fungal-grafted (Reaching vines), base attack bonus +4.
Benefit: You can use the Disarm, Trip, Drag, Reposition and Steal maneuvers in addition of the Pull maneuver. However, you cannot let go of the vines if countered.
So, what do you think?
I feel like there's very little reason to take Rapid Vines (I guess if you're caught without a weapon it can be handy for late game)since you'd normally get the vines on top of your regular iterative attacks. Outside of that, I like it.