Terms
Gifted: Those who have magical abilities
(Very Rare)Half-Gifted: Those who have magical abilities but have Null parents 
Null: Those who don't have magical abilities 
(Very Rare)Half-Null: Those who don't have magical abilities but have Gifted parents (Happens more often when the parents have two different elements)

Genetics (Strongest to Weakest)
1) Earth
2) Electricity
3) Fire
4) Water
5) Ice
6) Air
7) Healing
8) None