That sounds like a good feat for aspiring elemental conjurers.
Though, possibly more in tune with ravenloft might be to turn the feat into 'Dread Elemental Binding' , which would :
1) Raise the chance of an dread elemental being called forth ( from 25% to 50%, maybe?)
2) Either bind or give a chance at binding ( also 50%?) the dread elemental at your command.
Perhaps also an Reputation penalty? Presumably, anyone who willingly binds dread elementals to his will might be considered in a negative light.
Anyway, my thoughts, feedback would be great!