Permission granted (here's hoping!).
The power of the Dark Speech is almost infamous throughout all the planes of existence, and while many try to learn this foul language, few have lived to tell of their success. Still, even among those powerful enough in mind, body, and spirit to withstand the Dark Speech's toll have only taken their first steps toward true mastery of the Dark Speech. Only powerful and corrupt mages who have long since mastered the ability to verbally manipulate others can lay claim to the title "Wielder of Words". Where even the most depraved souls are stuck using this ancient tongue to simply bellow curses at their enemies, the Wielder of Words has used their knowledge of manipulation, evil language, and magical power to fill themselves to the brim with the full potential power the Dark Speech has to offer its practitioners.
Skills: Bluff 10 ranks, Diplomacy 10 ranks, Perform (Oratory) 10 ranks, Sense Motive 5 ranks
Feats: Dark Speech (Elder Evils)
Spellcasting: Must be able to cast 3rd level Enchantment spells
Special: Must speak both Abyssal and Infernal
Special: Must have personally convinced another individual to speak the Dark Speech
Level BAB Fort Ref Will Special Spellcasting 1 +0 +0 +0 +2 Silver-Tongued +1 +1 level of existing casting class 2 +1 +0 +0 +3 Moxie (Knowledge Skills) 3 +1 +1 +1 +3 Powerful Speech +1 level of existing casting class 4 +2 +1 +1 +4 Silver-Tongued +2 5 +2 +1 +1 +4 Moxie (Armor Class) +1 level of existing casting class 6 +3 +2 +2 +5 Filthy Outburst 7 +3 +2 +2 +5 Silver-Tongued +3 +1 level of existing casting class 8 +4 +2 +2 +6 Moxie (Saves) 9 +4 +3 +3 +6 Master Manipulator +1 level of existing casting class 10 +5 +3 +3 +7 Silver-Tongued +4; Dark Orator
The Wielder of Words' class skills (and the key ability score for each skill) are Appraise (Int), Bluff (Cha), Concentration (Con), Craft (Int), Decipher Script (Int), Diplomacy (Cha), Disguise (Cha), Escape Artist (Dex), Forgery (Int), Gather Information (Cha), Hide (Dex), Intimidate (Cha), Knowledge (Int; All skills taken individually), Listen (Wis), Move Silently (Dex), Perform (Cha), Profession (Wis), Search (Int), Sense Motive (Wis), Sleight of Hand (Dex), Speak Language (None), Spellcraft (Int), Spot (Wis), Use Magic Device (Cha)
Skill Points at each Level
Spellcasting: At each odd level, you gain new spells per day and an increase in caster level (and spells known, if applicable) as if you had also gained a level in a spellcasting class to which you belonged before adding the prestige class level. You do not, however, gain any other benefit a character of that class would have gained. If you had more than one spellcasting class before becoming a Wielder of Words, you must decide to which class to add each level for the purpose of determining spells per day, caster level, and spells known.
Silver-Tongued (Su): Starting at first level, you add this bonus (+1 at first level) to every Cha-based skill check you make. This bonus increases every three levels.
Moxie (Su): At the levels indicated, you add your Charisma modifier as a profane bonus to the abilities specified (Knowledge Skills at second level, Armor Class at fifth level, and saving throws at eighth level). In the case of Armor Class, this bonus applies even against touch attacks or when the Wielder of Words is flat-footed; however, the Armor Class bonus is lost when she is immobilized, helpless, or carrying a heavy load.
Powerful Speech (Ex): You have begun subtly weaving the slightest traces of the Dark Speech into your spellcasting to increase their power through words alone; as a result, no spell you cast requires somatic or material components anymore (unless the material component has a listed cost). As a side-effect, you permanently lose 2 point of your Constitution score. This loss cannot be prevented in any way.
Filthy Outburst (Ex): You gain "Filthy Outburst", as a bonus feat; if you already possess it, you may choose a different Vile feat in its place.
Master Manipulator (Ex): So great is your skill at verbal manipulation that even reality can be bent to your desires with the right words. Up to a number of times per day equal to your Charisma modifier, you may use your Perform (Oratory) skill in place of any other skill. If using Perform (Oratory) would normally ruin the point of the skill it's replacing (such as Move Silently), it does not.
Dark Orator (Su): You have been invoking the Dark Speech often enough that you've developed a slight resistance to its detrimental side effects. Any time you would take ability damage due to using your "Dark Speech" feat or your "Filthy Outburst" feat, you reduce the ability damage by 2, to a minimum of 1. Unfortunately, the effects of channeling the power of the Dark Speech so often have left your mind addled just a smidge: you permanently lose 2 points of your Wisdom score. This loss cannot be prevented in any way.