Draconic Claw( Complete Arcane, p. 77)
You develop the natural weapons of your draconic ancestors.
Draconic Heritage (CAr) ,
You gain claws. You can make a natural attack with your claw, dealing damage based on your size (Small 1d4, Medium 1d6, Large 1d8). In any round when you cast a spell with a casting time of 1 standard action, you can make a single claw attack as a swift action (see page 86) against an opponent you threaten