The way of the rudiplorker are many and varied. The Combat Doppleganger approaches it through precise and perfect mimicry, copying not the mere actions of a creature but the skill and talent put into these acts. The Combat Doppleganger becomes a more dangerous foe the more dangerous foe they face as they become more and more like that foe themselves.
BECOMING A COMBAT DOPPLEGANGER
Becoming a Combat Doppleganger requires a skill at mimicry, disguise, and observation. Most stumble upon these techniques almost by accident, running off a natural talent which eventually evolves into skill.
Skills: Bluff 5 ranks, Disguise 11 ranks, Spot 11 ranks.
Feats: Skill Focus (Disguise)
The following skills are class skills for the Combat Doppleganger and their key ability scores: Autohypnosis (Wis), Balance (Dex), Bluff (Cha), Climb (Str), Concentration (Con), Disguise (Cha), Escape Artist (Dex), Forgery (Int), Gather Information (Cha), Heal (Wis), Hide (Dex), Jump (Str), Knowledge (Local) (Int), Listen (Wis), Move Silently (Dex), Open Lock (Dex), Perform (Cha), Profession (Wis), Ride (Dex), Search (Int), Sense Motive (Wis), Sleight of Hand (Wis), Spellcraft (Int), Spot (Wis), Swim (Str), Tumble (Str), Use Magic Device (Cha), and Use Rope (Dex).
Skills Points at Each Level: 6 + int
Hit Dice: d10
Level Base Attack Bonus Fort Save Ref Save Will Save Special 1st +0 +0 +2 +0 Easy Disguise, Copy Skill, Learn Armaments 2nd +1 +0 +3 +0 Copy Combat Prowess 3rd +2 +1 +3 +1 Copy Feat, Power in Opposition 4th +3 +1 +4 +1 Mirror Spell, Reflected Will 5th +3 +1 +4 +1 Copy Form 6th +4 +2 +5 +2 Copy Sorcery
Weapon and Armor Proficiency: A Combat Doppleganger does not gain any new weapon and armor proficiencies, but see Learn Armaments below.
Easy Disguise (Ex): A Combat Doppleganger does not suffer a penalty to disguise checks for disguising themselves as a different gender, race, or age category.
Copy Skill (Ex): Whenever a Combat Doppleganger observes another creature use a skill they may copy either that creature's skill ranks or total skill modifier in that skill. If they copy the skill ranks they may use that creature's skill ranks in place of their own for 10 minutes. If they copy the modifier they may use that creature's modifier in place of their own for 10 minutes but still suffer any penalties they might possess (such as due to an ability score penalty or armor check penalty). This ability is a free action which may be used outside of their own turn, but if a Combat Doppleganger uses this ability to Copy another skill then they lose the original Copied Skill. A Combat Doppleganger who has copied a creature's skill may not copy that skill of that creature again for 8 hours.
Learn Armaments (Ex): A Combat Doppleganger who observes a creature proficient with a weapon, armor, or shield use it for 10 minutes (this time needs not be consecutive or all a single creature) gains proficiency in that weapon, armor, or shield permanently.
Copy Combat Prowess (Ex): The core technique of a Combat Doppleganger. Beginning at 2nd level whenever a Combat Doppleganger observes an attack they may, as an immediate action, copy the combat skill of the attacker. If they do so the Combat Doppleganger uses their attacker's Base Attack Bonus in place of their own for 5 rounds. A Combat Doppleganger who has copied a creature's Combat Prowess cannot copy that creature's Combat Prowess again for 8 hours.
Copy Feat (Ex): A Combat Doppleganger observing a creature may copy that creature's feats and talents. Beginning at 3rd level a Combat Doppleganger may, as a standard action, observe a creature and gain the benefits of any 2 feats that the creature possesses for 1 minute. The Combat Doppleganger names two feats and if the creature has one or both of those feats they gain them, if the creature does not have one or both of those feats the Combat Doppleganger gains feats of the target chosen by the DM. A Combat Doppleganger possesses these feats for 1 minute and then they are lost and the Combat Doppleganger cannot copy feats of that creature again for 8 hours. If a Combat Doppleganger uses this ability while they already have copied feats the previous copied feats are lost.
Power in Opposition (Ex): A Combat Doppleganger per force becomes an expert in mirror matches, and in forcing matches to be such. Beginning at 3rd level whenever a Combat Doppleganger which makes an opposed check against a creature they can see they gain a +4 bonus to that check. If both checks are of the same type (such as Grapple vs Grapple, Str vs Str, etc) the Combat Doppleganger may use their opponent's bonus +4 instead of their own, but do not gain any bonuses their opponent gains that are only applicable when initiating or resisting (such as +4 from stability).
Mirror Spell (Sp): A Combat Doppleganger can observe and replicate even the arts of magic and spellcasting. Beginning at 4th level a Combat Doppleganger may, as an immediate action, copy a spell or spell-like ability they can see being cast but only to counter it. The spell must have at least one component which the Combat Doppleganger may observe (they may not copy a spell-like ability unless it is like an invocation which has a somatic component, and they may not copy a stilled silenced spell without a focus or material component), and they must be able to observe all components for the spell. This functions like casting a spell to counter it, except it may also work on Spell-like Abilities. A Combat Doppleganger may only use this ability 3 times per day.
Reflected Will (Ex): A Combat Doppleganger is able to copy even their foe's mental state when necessary, using that connection of minds created by effects which affect the will. Beginning at 4th level whenever a Combat Doppleganger must make a Will save against a Supernatural or magical (spell, spell-like ability, etc) mind-affecting effect they may use the source of that effect's Will save in place of their own. This does not require an action on their part.
Copy Form (Su): A Combat Doppleganger's mimicry is near flawless, their very body shifting to copy a creature. Beginning at 5th level a Combat Doppleganger may, as a standard action, copy a creature's form. This functions as a polymorph spell except that they do not heal, they can select any creature regardless of type or hit dice, they may only transform into a creature they are currently able to observe, they gain Extraordinary special qualities possessed by the target, and they gain that creature's physical ability scores instead of the average for the race. The Combat Doppleganger may remain in this form for 1 minute, or until they use this ability again, and once they have copied a creature this way they may not copy that creature's form again for 8 hours. Once per day when a Combat Doppleganger uses this ability they may gain Supernatural attacks and qualities possessed by the copied creature as well as Extraordinary ones.
Copy Sorcery (Su): A Combat Doppleganger can copy even the forces of magic which surround and empower their foes, and friends. Beginning at 6th level a Combat Doppleganger may, as a standard action, copy all active spell effects, vestiges/spirits bound, martial stances, and soulmelds/veils shaped (along with essentia/essence invested therein) of one creature they may observe. They maintain these effects for 1 minute or until they use this ability again. A Combat Doppleganger which uses this ability again loses all copied effects from the previous use, and a Combat Doppleganger may not copy effects on a creature they have used this ability on again until 8 hours have passed.