When HP is above 90%, increases CRIT Rate by 14/18/22/24/28%.
In Game Description
A sword that once shone like the sun. The wielder of this sword will be blessed with a “feel-good” buff. The reflective material on the blade has long worn off.
How to Get Harbinger Of Dawn?
Obtainable from wish. You can also obtain Travelers Handy Sword from Kaeya during his story quest, where you have to hunt for Kaeya “treasure”
Weapon Upgrade Materials
Here’s all material used to upgrade Harbinger Of Dawn: