Quote:
Surge of Strength:
A dragon-bonded can call for a quick boost of strength from his pact-partner, dealing an extra 3d6 damage
on any one attack. The dragon-born must decide before an attack is resolved whiether it will use this power. If the attack misses, that use of the surge of strength is wasted.
I presume you mean once a day, or once an encounter or some other restriction otherwise you could pull this off for every attack.
I see no downside, so it needs a restriction.