Having activated the [Simulacra, Myriad Beings] Array Technique, how could Li Fan possibly stop just because of a few pleas from Mirror Profound?
From previous Reincarnation experiences, Li Fan had already grasped the nature of this Mirror Profound. Perhaps for safety's sake, Li Fan might spare him a small trace of life. But for the mirror spirit of the Tianxuan Mirror, Li Fan would certainly not let Mirror Profound remain!
The Dharma Transmission received the Treasure Mirror long ago, and still chose to retain the existence of the artifact spirit, merely leaving a Handler to control. This was absolutely because he lacked strength and could not accomplish it. But Li Fan was different.
Not only with the Immortal Array's blessing, but also knowing and grasping the human replica of Mirror Profound.
This human replica amounts to Mirror Profound creating a tailored version for himself, without the constraints of Immortal Instruments.