Alright, here's one:
Taunt Dragon, from Dragonmarked, is a 4th level spell that's on the Paladin and Bard lists.
Its effect? If the dragon you're targeting performs any action that isn't attacking you/moving towards you to attack you, they take a penalty to their attack rolls, skill checks, and saves according to what level of Dragonmark you have.
Least is a -5 penalty.
Lesser is a -10 penalty.
Greater/Siberys? -20.
Too bad giving other people the Dragonblooded type is so damn hard...