Well, I felt like I needed to do one or two of the working drafts.
Updated.
The
Improved Breath Evasion hasn't been moved to the
Improved Additional Special Abilities section and it's missing the Improved Metamagic feats.
e.g.:
Improved Additional Special Abilities
The undead dragon slayer may choose the following special abilities if it has a BAB of at least +12 or a caster level of at least 12th. To choose an improved ability, the undead dragon slayer must already possess the corresponding special ability given above.
Improved Anti-Dragon Evocation (Sp): The undead dragon slayer's Anti-Dragon Evocation does +100% extra force damage instead of +50%.
Improved Breath Evasion (Ex): The undead dragon slayer gains improved evasion (as the rogue class feature) against breath weapons.
Improved Dazzling Display (Su): The undead dragon slayer may make a dazzling display as part of a standard attack action or a full attack action, and the dazzling display DC gains a +2 enhancement bonus (see Dazzling Display above). To select this special ability, the undead dragon slayer must already have the Dazzling Display special attack.
Improved Dragon Defense (Ex): The undead dragon slayer gains an additional +2 dodge bonus to AC and a +1 bonus to Reflex saves against attacks made by dragons, which stacks with Dragon Defense.
Improved Enchant Dragon (Sp): When the undead dragon slayer uses its Enchant Dragon ability the Enchantment spell gains a +1 bonus to DC and a +1 bonus on caster level checks to overcome a dragon's spell resistance.
Improved Scry Dragon (Sp): When the undead dragon slayer uses its Scry Dragon ability the Divination spell has a +2 bonus on caster level checks to overcome a dragon's spell resistance and its range increases by 200% (this includes the bonuses from Scry Dragon).
Improved Transmute Dragon (Sp): As Improved Enchant Dragon (see above), except it alters a Transmutation spell.
Improved Weapon Throwing (Ex): An undead dragon slayer can throw any weapon as an attack against a dragon. The attack does not take any penalties for being an improvised weapon but instead gains a +4 racial attack bonus and does additional damage equal to 1d6 plus 1d6 per 2 HD of the undead dragon slayer. The attack bonus does not stack with that gained from the Weapon Throwing ability.