The design is based loosely around The Black Sword from Genshin Impact and Keqing's burst attack from that game. I hope this is okay.
The weapon's stats are as follows:
Damage: 60 - 80
Knockback: 1
Speed: 8
Defense: 2
Crit Chance: 25%
Crit Multiplier: 3x
The weapon can be bought from Marlon for 100,000 gold.
The weapon has the following special attributes that require Advanced Melee Framework to work:
On critical hit, it heals the user for %60 of damage dealt
On special attack, it performs a five-pointed star attack with lightning at each point (with a cool-down of 10 seconds).
Here's a video of the weapon in use (healing sound is removed in the latest version):
Technical Notes
Requires JSON Assets and Advanced Melee Framework.
If you want to complain or ask for help or help me test my mods, you can visit my Discord server.
A list of all my mods for Stardew Valley is available at https://www.nexusmods.com/stardewvalley/articles/895.