Why can't Luen runes be used casually?

Because every symbol in Rune has a very far-reaching and independent meaning, it can't be used casually.

Luen runes generally refer to the word Luen. Rune, also known as rune, is an extinct alphabet used to form rune language. In medieval Europe, especially Scandinavia and the British Isles, it was used to write some Nordic Germanic languages.

Luen (Rona, Rouen, Luno, etc ...) originally meant secret and mystery, so mystics thought that Odin had acquired the secret of the universe Luen, which was taught to human beings by Ríg (Heimdahl) and expressed in the form of Luen alphabet.

Futhark is a common Germanic Luen letter. The name futhark is taken from the first six letters of Luen, and the traditional Futhark-* * has 24 letters. Some modern people will add a blank stone "blank rune" when divining, and such a * * * is 25 pieces. The empty character is actually the invention of Ralph Bloom.

Modern use

Decoration: In daily life, letters were used in decorations and buildings at that time.

The above content comes from Baidu Encyclopedia -Rune.