This property defines the Unicodes which belongs to Deseret block
Characters like 𐐀,𐐁,𐐂, etc. are listed under Deseret Block.
80 Characters are present in Deseret Block starting with the Unicode point U+10400 that represents the character 𐐀.
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.