English (Source)
<Highlight>{{ON_ATTACK:CHANCE:percent}}%</> chance on attack to trigger an additional attack. Each bonus attack may also trigger an additional attack.
Japanese Translation
攻撃時の<Highlight>{{ON_ATTACK:CHANCE:percent}}%</>の確率で追加の攻撃を引き起こすことができます。各ボーナス攻撃も追加の攻撃を引き起こす可能性があります。