Infitus is Core's mechanical planet. Built souly to destroy.

In this picture the planet isnt destroyed, but is being built. Much different from the Death star, Infitus can project a device into the core of any planet its aimed at, opening a rift within it's core causing the planet to implode. Fully mobile and equiped with Rift Nodes(devices that open rifts upon detonation) it also holds a much greater purpose for Core's plan. That of which you will have to find out for yourselves when the comic is released =3

Infitus/Core/The Riamus universe: (C) Me