Galdr, Lokkr, Rokkr
Galdr basically is magick through the use of the voice or projection. It is the principal of all words having power, which means that any idea or thought that is spoken or written is given life making it more real to us in the physical realm. It is also the understanding of when to speak, when to be quiet and what content to use at the time. By projecting when using magick or Galdr you are bringing forth from within, to the outside.
Lokkr is the ability of using magick to draw something into you or to call upon something. An example of this is an evocation
The Rokkr are the primordial forces such as nature, the sun and the moon. You can use them to lean your magick on for greater effects. They are all from natural sources. Finally the above are all basics of Norse magick and should be learnt if attempting to become a a shaman or Vitki