Nightbringer | The Arthurian Online Encyclopedia

Priamus’ Balm

When wounds were anointed with this balm and then washed from a vial of the four waters that came out of Paradise, the wounds healed within an hour. This worked for any wound; it was also the only way wounds from Priamus’ sword could be staunched.

Lynette may have gotten this balm from Priamus of Tuscany and used it to heal at least one knight of her own. Since her ointment seems to have required no washing with the four waters of Paradise, however, I imagine she had her own magical healing potion.