Cleon
Legend
"Menu Item":
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 +1d6 plus +1d6 per 2 HD of the undead dragon slayer of extra damage. The attack bonus does not stack with that gained from the Weapon Throwing ability.
For all of them:
Weapon Throwing (Ex): Undead dragon slayers 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 +1 racial attack bonus.
The phrasing of the damage bonus is a bit cluttery, why not...
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.