So, the Elemental Spell Metamagic Feat from the Advanced Player's Guide allows me to change a spell's energy type. So I can make my Magic Missiles do cold damage by using them as a level 2 spell.
My favored class option as a Kobold Sorcerer simply says "Add +1/2 point of the chosen energy damage to spells that deal the chosen energy damage cast by the sorcerer." My chosen type is cold.
My question is, would the damage get added to each Magic Missile when I shoot more than one? I know the Wizard Intense Spells feature only adds to one missile, but the Kobold favored class option isn't nearly as specific. Is it intended to work the same way as the Wizard feature?
Also, with spells that do ongoing damage (such as Frost Fall) does the bonus damage get added each time the spell does damage?