Youthful Fantasy

Increases Break Intensity by 60/67/74/81/88. Seals Arc: Black Tome with two chains by default. Unleashes 1 chain each time any character on the team casts a Support Skill. Makes Arc: Black Tome available when all two chains are unleashed. Arc: Black Tome — Summons the Black Tome for 20s. Designates an enemy every 5s. Increases the wearer's Chaos DMG dealt to designated enemies by 20/24/28/32/36%. Deals Chaos DMG equal to 2/2.3/2.6/2.9/3.2% of the wearer's ATK to designated enemies when they take Break Damage.

Placeholders like {0} scale with refinement — check in-game values for the exact ranks.