How did The Never Queen's heart end up in the center of The Impericon? Simple. It was cut from her chest using the Edge of Reality.

The mysterious person seen with Zed, gives him the Edge of Reality. It is said to be able to cut through reality itself and sever the intangible as though it were tangible. Zed not only used this blade to cut out the Never Queen's heart, but also the very fabric of reality.

The Edge of Reality when brandished gives the wielder bright golden armor.

After Zed fought the Silver Surfer, the sword vanished with Zed when he went to the lands of couldn't-be-shouldn't-be.