[The Remnant Rainbow] was lost, and of course Yi Dong knew about it.
To be precise, it wasn't that he 'forgot something,' but rather he had no time or energy to retrieve that very powerful medium. Judging from Motan's tone when he sent the message, there was a nine out of ten chance he would lose control after making that strike. At the time, Yi Dong only had a few dozen seconds left in his [Super Spiritual Body] state. So, after [The Remnant Rainbow] was knocked away, Yi Dong decided, 'Though it's certainly a pity, if I go to pick it up now, I will most likely die,' and then he ran off without looking back.
