Lost Labyrinth treasure

The Lost Labyrinth treasure is a mysterious orb of unknown magenta energy that Metal Sonic finds hidden in Lost Labyrinth Zone in Sonic the Hedgehog 4: Episode Metal.

Sonic the Hedgehog 4: Episode Metal
Metal Sonic finds the treasure in an altar in a hidden room in Lost Labyrinth Zone, Metal Sonic walks up to 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.

Upon arrival at Splash Hill Zone, Metal Sonic uses the power of the treasure to scare the gaily bounding animals, before using a nearby rocket to continue his pusuit of Sonic the Hedgehog.

Sonic the Hedgehog 4: Episode II
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's involved in. However, his efforts prove futile as Metal Sonic is defeated once again.

Sonic & All-Stars Racing Transformed
It shows up when Metal Sonic uses his All-Star Move.

Abilities
The treasure appears to be a powerful energy source, since when Metal Sonic absorbs the artifact, he gains an energy surge. With the orb, Metal Sonic gains several new abilities; an increased dash speed, an augumented Spindash which is capable of destroying a rollercoaster track, and the ability to generate pillars of electricity and create massivie spheres of energy. Whilst charging up these attacks, Metal Sonic is immune to all attacks and cannot be harmed. When using these new moves and powers Metal Sonic gains a magenta aura.