The artifact appears to be a very powerful energy source. When harnessing it, Metal Sonic's physical attributes were amplified to the point where he could destroy entire tracklines with a single Spin Dash and turn himself temporarily invulnerable when focusing its power. In addition, the artifact bestowed Metal Sonic with the ability to manipulate different energies. By charging his power, Metal Sonic's body would give off energy shockwaves, discharges and a magenta aura. He could also generate pillars of electricity and create massive energy spheres.
Sonic the Hedgehog 4
Sonic the Hedgehog 4: Episode Metal
Metal Sonic finds it in an altar in a hidden room in Lost Labyrinth Zone. He walks up to the altar and absorbs the treasure. After absorbing the orb, Metal Sonic gains a massive energy surge and blasts through the zone, moving onto the next one.
In Sonic the Hedgehog 4: Episode II, Metal Sonic uses powers he gained from the artifact to attack Sonic and Tails in two of the five boss battles he is involved in. However, his efforts prove futile as Metal Sonic is defeated once again.