Phantom Ruby

The Phantom Ruby is a powerful gemstone that can create powerful illusions that can also affect reality. There are two types: The Prototype ruby, which only works with the one who first touched it. Most of these were destroyed, but one is still in fruition. Then there's the Finalized ruby. This one is powerful enough to render all other rubies useless, and can be used by anyone. This one is currently in possession of Infinite.

Owners of Phantom Rubies

 * Ripto has a Prototype embedded into his sceptre. As far as anyone knows, this is the last Prototype ruby in existence.
 * Infinite has the Finalized ruby stuck on his chest.

Trivia

 * It can also nullify the effects of the Chaos Emeralds, as shown in Sonic Mania.