The yarn used to close the box is called Tridatu.
The Balinese-Hindus wear it as scared bracelets for protection. The bracelets are purified by holy water and blessed with prayers.
They are a symbol of Godly power and magic.
And endows the wears with purity and longevity, by cleaning the mind and preventing negative.
The art on the cards is created by Dutch artist Irene Hoff. The images are cut-outs of her original mixed media paintings.