Primal dragon skill is an attack that you can use against boss's. U can only get the primal skill after going to see lady celestia's apprentice and doing her quest. You must also have the orb for...
the light primal is in the sandsea where you get the orb of light, the wind orb is in the ninja wind town or the pirate place, the energy orb is in popssprocket, the ice orb is in draesvard and I...
It is a bit hard, because you have to go to Lady Celestia, then click on the button which says 'Primal Dragon Sklills'. This will take you to fighting a titan and if you win then you will gain two...