Eye Stones in Demon's Souls and Demon's Souls Remake are consumable items that are used for multi-player situations. They can be used from the consumables inventory or from the quick slots if assigned.
Eye stones are often used near the start of the level and just before entering a Boss arena. When available, the message "You can summon here." will prompt for the player.
There are some areas of in each level where Colored Eye Stones become unavailable.
All Eye Stones in Demon's Souls
|Name & Icon||Usage||Location|
|Allows the player in Soul form to invade other worlds as a Black Phantom||
|Allows other players to summon you to their world as Blue Phantom|
|Send a Red Soul Sign to other worlds and summoned as a Black Phantom||
|Send summoned Phantoms to their original world as a Host or return to your own world as a Phantom|