Battleshifter Training( Races of Eberron, p. 116)
Your shifter fighting instincts grant you a sophisticated blend of defensive techniques and controlled attacks.
base attack bonus +6, Shifter,
Battleshifter Training enables the use of three tactical maneuvers when you fight while shifting. Tiring Defense: To use this maneuver, you must use the Combat Expertise feat (taking a penalty of at least -2 on your attack rolls) or fight defensively for 2 consecutive rounds. Any creature that attempts a melee attack against you in both rounds but fails to hit you becomes fatigued, provided that you successfully strike the creature with a melee attack at least once during those 2 rounds. This effect continues for as long as you use Combat Expertise (taking a penalty of at least -2 on your attack rolls) or fight defensively. Creatures that were already fatigued before they attacked you must make melee attacks against you and miss for 4 consecutive rounds before becoming exhausted (just as if they had not been fatigued). Exploit Weakness: To use this maneuver, you must make a melee attack against a creature suffering from one of the following conditions: fatigued, exhausted, dazed, or dazzled. If you hit with your melee attack, you deal an extra 1d6 points of damage. You cannot use this maneuver during a round in which you also use Combat Expertise or fight defensively. Riposte: To use this maneuver, you must use Combat Expertise (taking a penalty of at least -2 on your attack rolls) or fight defensively. When a foe uses a full attack action against you but fails to hit you, you can spend 1 action point to make an extra melee attack against that foe as an immediate action (see page 181).
Battleshifter Training and Ragewild Fighting (see page 118) are inimical to each other; no character can have both tactical feats. If a character chooses to take one of these feats while already having the other, he gains the benefits of the new feat but forever loses access to the first (and does not gain a new feat to replace it).