War Water has many usages, but the most common one is for banishing.
There are different ways to create War Water, however, I will be giving you a rather simple version.
The creation process takes time, so if you need quick banishment, and do not have time to create War Water (or you do not have any ready), use the energy technique like Reiki or visualization.
Needed Items:
• Glass jar
• Cut or rusty iron nails
• Water
You may also add other ingredients you see fit; for example: drawing Tiwaz Rune on the lid of the jar with copper paint.
Fill your jar with water and throw in the nails (and any other ingredients you’ve chosen to include).
The key to create War Water is oxidation, so store the jar in a cool place for several weeks while occasionally allowing it to “breathe” by opening up the lid for the first week only.
During these “breathing” gaps, you can chant Galdr with strong focus into your War Water (opt for the Galdr of the Rune you’ve painted on the jar’s lid); this ought to make the War Water that much potent and stronger.
Stay safe, be curious, protect yourself and your own.
Blessed be!