Increases DMG against opponents affected by Pyro or Electro by 12/15/18/21/24%.
In Game Description
A steel sword that is said to have been coated with dragon blood, rendering it invulnerable to damage. This effect is not extended to its wielder, however.
How to Get Bloodtainted Greatsword?
Obtainable from gacha.
Weapon Upgrade Materials
Here’s all material used to upgrade Bloodtainted Greatsword: