Although there is no concrete evidence to prove that the "Reincarnation Casket" refined by Ivor is the same Mysterious Object as the "Reincarnation Casket of the Undead" mentioned by Frost, there are indeed some similarities between the two.
The most obvious similarity lies in their names. Both being Mysterious Objects, yet possessing similar names, which should be quite uncommon.
However, a similarity in names could also be a coincidence, after all, it is noted that Ivor's "Reincarnation Casket" is tentatively named.
Apart from the name, the second point of resemblance is that there may not be many Mysterious Objects with similar names, but those that are out of control are even rarer.
