Pour the baking soda or cornstarch into a bowl. Hold your hands over it and bless/consecrate it to absorb all negative and harmful energies. Visualize the white powder sucking the black, harmful energies right out of the air around it.
Using a mortar and pestle, or a food processor, lightly grind the sage. Bless/consecrate it to transform harmful energy into positive and vibrant energy. Visualize the harmful, black energy being vibrated until it becomes clear or white; visualize the sage raising the vibration of the harmful energies.
Blend the two together in your bowl, and empower your powder by visualizing your space being totally full of white, healthy, positive energy!
Pour into your storage container or use it!