This property defines the Unicodes which belongs to Marchen block
Characters like 𑱰,𑱱,𑱲, etc. are listed under Marchen Block.
71 Characters are present in Marchen Block starting with the Unicode point U+11C70 that represents the character 𑱰.
Currently, as per latest version 15.0.0, Unicode supports 328 number of Block. Here are a few examples - Latin Extended E,Adlam,Aegean Numbers, etc.