Altar of the Emeralds

The Altar of the Emeralds is a shrine constructed to absorb energy from the Chaos Force into the Master Emerald, using the energy to keep Angel Island afloat. It consists of a central pillar for the Master Emerald and seven radial pillars, designed to use the seven Chaos Emeralds as collectors but also capable of absorbing Chaos energy from the air.

The Altar was originally situated on the peak of the Holy Summit, but now sits on its own floating landmass attached to Angel Island by a bridge.

History
In the mid-20th century as part of his research on the Echidna civilisation, human scientist Gerald Robotnik used the Altar as the basis for the Chaos energy extractor for the Eclipse Cannon on the Space Colony ARK.