Natural Magic (4e Sorcerer Variant)
From D&D Wiki
You can select Natural Magic as your spell source in place of Dragon Magic or Wild Magic.
 Natural Magic
Magic flows through all things, and an unusually large amount of magic flows through you. The magical power that flows through you is so great that it could not be held within you, so it burst forth, revealing your magical nature. Through force of will, you channel your own innate magical power.
Natural Power: You gain a bonus to the damage rolls of arcane powers equal to either your dexterity modifier or intelligence modifier. The bonus increases to either your dexterity modifier +2 or intelligence modifier +2 at 11th level and either your dexterity modifier +4 or intelligence modifier +4 at 21st level. You choose the ability score this ability is based on at 1st level. This choice remains throughout your character's life and cannot be changed.
Elemental Soul: Choose a damage type: cold, fire, force or thunder. You gain resist 5 to that damage type. The resistance increases to 10 at 11th level and 15 at 21st level.
Your arcane powers ignore any target's resistance to that damage type up to the value of your resistance.