Are you worthy of a miraculous?
Miraculouses are magic jewellery that allow humans to communicate with kwamis. The also turn their holders into super heroes/villains, depending on the case. I think they are made from vibranium and magic energies.
To become a miraculous holder, you have to pass a test set by a guardian, they distribute the miraculous. After the Spellbook was lost, so were two of the miraculous. But this virtual assessment will determine if you are ready. Note: I do not own Miraculous Ladybug.