Cleon
Legend
Hmmm, I had been thinking standard, but I like making it part of a full attack.
Maybe boost the DC for the Concentration check. That's the check that makes sense to use.
Dazzling Display (Su): As a standard action or part of a full attack action, an undead dragon slayer may make a series of complicated motions with its weapons which befuddles any dragon that sees it. A dragon within 30 ft that views the display (as a gaze attack) must make a Fortitude save or become dazzled for X rounds. In addition, the dragon must make a Concentration check at XX DC to cast any spell, use a spell-like ability, or maintain a spell that requires Concentration.
That looks OK apart from the first sentence. I was thinking the Undead Dragon Slayer has to give up the first iterative attack of a full attack to use a Dazzling Display, or make some other sacrifice.
I suppose we could give it some sort of attack penalty (-2?) instead of giving up an attack?