You literally drop them when killing mobs from Isabella or Jacks event.
Install the Black Desert Launcher if the game doesn't start.
The launcher will appear if it's installed.
If it doesn't, try to run your downloaded launcher.
1 Run BlackDesert_Installer_NAEU.exe to install the Black Desert launcher.
2 Start the game once installation is complete.
You literally drop them when killing mobs from Isabella or Jacks event.