Finite Stones

Finite Stones are items in Torn.

About
Finite Stones are deadly weapons that the First Sons planned on using to plunge the city into darkness, overtaking it. They are powered by Auraxideno, a deadly chemical in possession of the First Sons. The X.I.A. Agency, knowing that the Stones were in possession of the First Sons, sent their top agent X27 to the city of Feldis, where the First Sons were operating, to take the Stones from them.

Events of Torn
The first Stone was being held inside an office building in Downtown Feldis. X27 infiltrated the building during the Prologue mission, and retrieved the first Stone. However, the X.I.A. later found out that there are actually two Finite Stones, and the location of the second one was unknown. Through much discovery, they eventually find out that the second Stone is hidden deep inside the Catacombs, the First Sons' base of operations. X27 ends up infiltrating the Catacombs during the mission Facing Our Destiny, defeats Oblivion, leader of the First Sons, and retrieves the second Finite Stone.

Trivia

 * The name "Finite Stone" is a parody of the Infinity Stones from Avengers.
 * Finite Stones do not appear in Torn: Origins, and aren't even mentioned at all.