The Metallic Beast
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The armor and sword that Sol possessed responded to his own emotions. Whenever he wanted light, light would be created, whenever he wanted to slash, he would be able to slash… However, when they faced a strength that even shattered them into pieces, and that brought their owner to their deaths, they could only respond with the last remaining emotions he held.
Rage, absolute and pure maddening anger.
Reacting to this emotion, and also with the desire to protect their master, the sword and the armor melted to their most primary elemental form and merged with their dying master, seconds before he were to pass out.
Mixing his flesh and internal organs with the hot, molten metal of the armor and the sword, and quickly transforming and embodying his true emotions, his true self, a monster.