Equal parts of burned hurbs of protection ashes mixed in sea salt .. Or equal part of coal and salt. Makes a very powerful tool called Black salt. It's very powerful enough that is can give very long term and strong effect if used charged and blessed black salt.
With war water (combo) it can greatly work as banishing tool.It provide strong grounding,protection,cleansing,purification,Balance. .etc. It is advice to use this salt wisely,as it is also helpful in harmful magick and due to it's longevity action,it can greatly bring wide harm more than you asked. It is something called witches' must have tool.
Blessed Be .