[whswhs]

Note that there is also a thing called a Power Block, found in GURPS Powers. It requires a roll vs. 3 + (Will + Power Talent)/2. If you make the roll, you can do one of two things:

* If you have an ability based on DR, it doubles the DR for the attack you're blocking.

* If you have an ability based on Control or Obscure, each level of the ability counts as DR 1 against any attack of a suitable kind.

That latter sounds like it might fit the special effects you're looking at, though the cost might prove excessive. One level of Control Earth (Chi, -10%; Elemental, -10%) would cost the character 16 points and give DR 1.