Five Colors Holy Sword

Holy Sword of Pentechromata is a magic sword in possession of the Naüa family.

Description
The sword has been in with Count Naüa family for generations and has served as the families most sacred treasure.

Appearance
It was a longsword enchanted with the elemental powers but the blade was without an edge so it could only be used as a blunt weapon, like a dummy sword for swordsmanship practice.

Abilities
It is a magical enchanted blade with the elemental powers of fire, thunder, acid, sonic, and ice which dealt their respective damage types to a slashed target.

Trivia

 * Despite being called a Holy Sword, it did not deal holy damage and the name was likely changed from its original title over the generations.