Night's Edge - Official Terraria Wiki

The Night's Edge is a post-Skeletron broadsword. When swung, the Night's Edge emits fire-like purple particles, similarly to the swords used in crafting it, but the effect is more subtle and does not last as long. It is notable for having the highest base damage of a sword available before entering Hardmode, although on the  Desktop version,  Console version, and  Mobile version, it is tied with the Volcano at 40 base damage.

GuideNPC Happiness - The Official Terraria Wiki, PDF

1.4.4 - Official Terraria Wiki

Official Terraria Wiki - Feedback Thread, Page 2

True Night's Edge - Official Terraria Wiki

ArtStation - Night's Edge

GuideNPC Happiness - The Official Terraria Wiki, PDF

Night's Edge - Official Terraria Wiki

Classes in Terraria - Terraria Guide - IGN

Breaker Blade or Night's Edge? : r/Terraria