Only four Void Emeralds exist ever. The four are different coloured, each with the colours: black, white, light grey, and normal grey. It is said that the four Void Emeralds orbit The Galactic Emerald who is ET The Galactic Emerald. The Void Emeralds were lost once ET crashed into the Sonic World. ET is the guardian and user of these gems.
Only ET can see these Emeralds and can show them to others. If ET absorbs these emeralds its power will depend on the quantity of these Void Emeralds.
1 Void Emerald
ET will have the power to wipe out a planet in one swipe, if another person uses it, it will level a mountain.
2 Void Emeralds
ET will have the power to wipe out a star in one swipe, if another person uses it, it will destroy a moon.
3 Void Emeralds
ET will have the power to destory galaxies and universes in a swipe, if another person uses it, it will crush a planet.
All 4 Void Emeralds
ET will change shape into an unknown creature nobody has seen before and has the power to obliterate time and space itself in one flick. ET will not use this kind of power ever, he hasen't used it yet because he thinks he wont need it. If another person uses them, it can blow up stars.