In the historic sense of the word, a bind-rune, or bindrune, is nothing but two or more runes joined together on a single ”stem”. This can often be seen on Nordic rune monuments, where sometimes several words have been squeezed into a single rune.
Mostly, the use of bindrunes seems to have been a counterpart to modern abbreviations, and a way to save the often limited writing-space on the rune stones.
The possibility to fit several runes, or even entire words, into a single symbol, also enabled the bind runes to be used for magical spells and invocations. Very little is known about those practices in the Viking Age, and as far as I know, there are not two Viking bind runes that look the same. Most likely, the use of bind runes in the Viking Age was by no means formalized or governed by any particular rules, but highly personal and individual.
Bind runes are multiple runes joined together to form a single unique symbol. There are many uses for bind runes and they are limited to only where your imagination can take you.
It's important to note here that this is no one "formula" on how to make bind runes. Each rune reader/teacher will have their own style. There is no limit to the number of runes used to make one new bind rune. You can use as many as you'd like. But keep in mind that the more you use the more difficult it will be to clearly see all the runes that you have used. This isn't too big of a problem unless you plan to focus on your bind rune to help it let loose the combined rune powers.
Bind-Runes can be deemed as the basics to spell casting and is achieved through combining the runes to form a new rune shape. e.g. using Tyr and Feoh to bring in financial success.
