As a Seer, I can drain the Essence that powers a spirit, an alchemical infusion, or an artifact. I get +1 to attacks when attempting this, and on a Success with Style I can choose to create a Fair (+2) Essence Aspect instead of getting a Boost.
You can drain the essence that empowers a spirit, alchemical item, or enchanted artifact. You can either absorb the power into yourself or release it into the environment.