Philosopher Stone

The Philosopher's Stone is a legendary alchemic substance-item that can supposedly produce infinite energy for its user, granting whoever possesses it absurd levels of power. Originally thought to be nothing more than a rumor or a far-off theory in alchemy, it was later revealed by the Emerald Tablet belonging to Faust that the Stone is indeed real and that it is possible to create it, leading many groups such as Cheonghwado, Walpurgisnacht and even Red Dragon to desire it.