Elemental Bloodline (3.5e Trait)
From D&D Wiki
The small amount of elemental power resides in you.
Benefit: One of the four elements infuses your being, and you can draw upon its power in times of need. You must select one of the four elements: air, earth, fire, or water. You gain energy resistance 5 against your energy type. Air against Electrical, Earth against Acid, Fire against Fire, Water against Cold. You also have minor telekinetic control over the element of your choice this ability is not capable of dealing damage. You can lift an ammount of your element, determined by your GM, and move it at will from a distance. As a move action, you can propel the object as far as 15 feet in any direction.
Drawback: You are vulnerable to the opposing element of your chosen type, meaning to take half again as much (+50%) damage as normal from the effect, regardless of whether a saving throw is allowed, or if the save is a success of failure. Air against Earth and vice versa, Fire against Water and vice versa. Your elemental ancestry is also prominent in you appearance, making you appear unusual to others, this may present itself in the form or unnatural hair or skin colour, or the air around you feels different to others, for example for someone with the fire bloodline the air around them might feel uncomfortably warm. This unnatural appearance makes others uncomfortable around you, imposing a -2 penalty on all Diplomacy, Disguise, Gather Information and Handle Animal checks you make
Special: Must be taken at character creation