This variation of the Sphere of Light ritual can be adapted to allow in any type of desired energy, while still protecting you from negative energies.
This time, draw the ring of light with the intention that it be porous. Envision it as either having a spongy or smoke-like texture. Instead of reflecting energy back toward its source or out into the universe, it will ABSORB all the energy you come into contact with.
As you close the light dome above your head and below your feet, know that as it absorbs energy, it only allows beneficial or clean energy to enter your aura, while everything else gets grounded out and into the earth in the same way that you did it in the grounding exercises. Visualize the unwanted energies sliding off of the aura and going down into the earth to be recycled.