Berserker
Level 1: ATK +20% when HP is 50% or less
Level 2: ATK +21% when HP is 50% or less
Level 3: ATK +22% when HP is 50% or less
Level 4: ATK +23% when HP is 50% or less
Level 5: ATK +25% when HP is 50% or less
Level 6: ATK +26% when HP is 50% or less
Level 7: ATK +27% when HP is 50% or less
Level 8: ATK +28% when HP is 50% or less
Level 9: ATK +29% when HP is 50% or less
Level 10: ATK +30% when HP is 50% or less