Neaven

Neaven, known in the old ages as Mercury, was the former innermost planet to Archangel, before it was destroyed.

Features
Before its destruction, Neaven was very similar to the planet Nebun, but in a far more chaotic state. The extreme gravity of Archangel had fractured Neaven into multiple molten fragments. There was a human settlement buried beneath Neaven's surface, but it and its inhabitants were left to melt as their planet was annihilated.