Eye Stones

Name & Icon	Usage	Location
Blue Eye Stone	Allows other players to summon you to their world as Blue Phantom	Obtained upon clearingBoletarian Palace
White Eye Stone	Send summoned Phantoms to their original world as a Host or return to your own world as a Phantom	Obtained upon clearingBoletarian Palace
Black Eye Stone	Allows the player in Soul form to invade other worlds as a Black Phantom	Dropped by the first unnamed Black Phantom
Red Eye Stone	Send a Red Soul Sign to other worlds and summoned as a Black Phantom	Obtained after killing the Maiden in Black in the End Game scenario