You have learned to temper yourself against a single element, resisting its effects.
EXP Cost: 12 EXP
Benefit(s): You gain immunity to a single element chosen here (Fire, Cold, Electricity, or Acid) in which you already have Resistance 30 for. The element chosen cannot be an element in which you have a weakness to from another source.
This can be taken once more, costing 12 EXP the second time as well.