Even in the outside world, the immortal weapons were rarely seen treasures. The appearance of one represented the birth of a powerhouse.
An immortal weapon needed to experience countless battles to be born and absorb boundless spirit energy. Only then the first generation tool spirit would be born. However, the strength amplification provided by a weapon possessing tool spirit made the immortal weapon countless times more formidable. .
The unfortunate part was that immortal weapons left behind by previous generations might not be compatible with the new user's attribute. It meant that they might be somewhat inferior in respect to strength amplification, but they still weren't something that ordinary weapons could match.
An ordinary cultivator might not possess a destined immortal weapon their whole life, but even ordinary immortal weapons weren't something that anyone could find.