In Slow Power Phase players resolve Slow Powers, both the Innate Powers printed on their Spirit Panel and any Power Cards they played.

This works just like the “Fast Power Phase”, but for powers with the Slow Power blue turtle icon.

Same as with Fast Powers, players can choose to forego using a Power card or an Innate Powers completely. They still receive Elements from played Power cards. You don't get your Energy back for foregoing a played Power card.