Refinements:

While the character equipped with this weapon is in the party but not on the field, their DMG increases by 2%/2.5%/3%/3.5%/4% every second up to a max of 20%/25%/30%/35%/40%. When the character is on the field for more than 4s, the aforementioned DMG buff decreases by 4%/5%/6%/7%/8% per second until it reaches 0%.