Black swords fantasy

I recreated in 3d Evgeny Lavrentiev sketch of Death guard sword.

Time doesn't seem to have any effect on this sword.. what do these runes mean ? :) Here is a work on model a game ready asset based on concept from the talented Crazy Lion, whom I thank for allowing me to use his work. It was a fun challenge to study and make a scene with it in Unreal. Modelling in Blender, texturing with Substance and render in UE4 and Marmoset 4. Hope you like it :) https://crazylion1.artstation.com/