According to Dev note regarding to update plan in the third quarter of 2020 here. Some of contents have been updated as below. 1. Improves the effects of some Warrior's Grave headgear. Among the Warrior's Grave headgear. Some of their effects are inferior compared to others. So the team improve some of their effect to be equal to others. Old Driver Band (Yellow) : Improves Arm Cannon damage bonus from 5% to 15%.   Old Minstrel's Song Hat & Old Dying Swan