Elementrix (Main and Future)

There are only two people that use the Elementrix.

The Elementrix not only summons aliens and boots elemental power,but it tells time.

Here's who got the two versions of the Elementrix and how they got it

Pistol: After finding it in the first episode of E.S while battling Albedo

Sykai: After overcoming Azmuth's training in the second season.

The Elementrix has the power to keep Demise alive, so he continues to hunt it down.