diff --git a/data/overMastery.tsx b/data/overMastery.tsx
new file mode 100644
index 00000000..d3784973
--- /dev/null
+++ b/data/overMastery.tsx
@@ -0,0 +1,317 @@
+const overMasteryPrimary: ItemSkill[] = [
+  {
+    name: {
+      en: 'ATK',
+      ja: '攻撃',
+    },
+    id: 1,
+    slug: 'atk',
+    minValue: 300,
+    maxValue: 3000,
+    suffix: '',
+    secondary: [],
+  },
+  {
+    name: {
+      en: 'HP',
+      ja: 'HP',
+    },
+    id: 2,
+    slug: 'hp',
+    minValue: 150,
+    maxValue: 1500,
+    suffix: '',
+    secondary: [],
+  },
+]
+
+const overMasterySecondary: ItemSkill[] = [
+  {
+    name: {
+      en: 'Debuff Success',
+      ja: '弱体成功率',
+    },
+    id: 3,
+    slug: 'debuff-success',
+    minValue: 6,
+    maxValue: 15,
+    suffix: '%',
+    secondary: [],
+  },
+  {
+    name: {
+      en: 'Skill DMG Cap',
+      ja: 'アビダメ上限',
+    },
+    id: 4,
+    slug: 'skill-cap',
+    minValue: 6,
+    maxValue: 15,
+    suffix: '%',
+    secondary: [],
+  },
+  {
+    name: {
+      en: 'C.A. DMG',
+      ja: '奥義ダメージ',
+    },
+    id: 5,
+    slug: 'ca-dmg',
+    minValue: 10,
+    maxValue: 30,
+    suffix: '%',
+    secondary: [],
+  },
+  {
+    name: {
+      en: 'C.A. DMG Cap',
+      ja: '奥義ダメージ上限',
+    },
+    id: 6,
+    slug: 'ca-cap',
+    minValue: 6,
+    maxValue: 15,
+    suffix: '%',
+    secondary: [],
+  },
+  {
+    name: {
+      en: 'Stamina',
+      ja: '渾身',
+    },
+    id: 7,
+    slug: 'stamina',
+    minValue: 1,
+    maxValue: 10,
+    suffix: '',
+    secondary: [],
+  },
+  {
+    name: {
+      en: 'Enmity',
+      ja: '背水',
+    },
+    id: 8,
+    slug: 'enmity',
+    minValue: 1,
+    maxValue: 10,
+    suffix: '',
+    secondary: [],
+  },
+  {
+    name: {
+      en: 'Critical Hit',
+      ja: 'クリティカル確率',
+    },
+    id: 9,
+    slug: 'crit',
+    minValue: 10,
+    maxValue: 30,
+    suffix: '%',
+    secondary: [],
+  },
+]
+
+const overMasteryTertiary: ItemSkill[] = [
+  {
+    name: {
+      en: 'Double Attack',
+      ja: 'ダブルアタック確率',
+    },
+    id: 10,
+    slug: 'da',
+    minValue: 6,
+    maxValue: 15,
+    suffix: '%',
+    secondary: [],
+  },
+  {
+    name: {
+      en: 'Triple Attack',
+      ja: 'トリプルアタック確率',
+    },
+    id: 11,
+    slug: 'ta',
+    minValue: 1,
+    maxValue: 10,
+    suffix: '%',
+    secondary: [],
+  },
+  {
+    name: {
+      en: 'DEF',
+      ja: '防御',
+    },
+    id: 12,
+    slug: 'def',
+    minValue: 6,
+    maxValue: 20,
+    suffix: '%',
+    secondary: [],
+  },
+  {
+    name: {
+      en: 'Healing',
+      ja: '回復性能',
+    },
+    id: 13,
+    slug: 'heal',
+    minValue: 3,
+    maxValue: 30,
+    suffix: '%',
+    secondary: [],
+  },
+  {
+    name: {
+      en: 'Debuff Resistance',
+      ja: '弱体耐性',
+    },
+    id: 14,
+    slug: 'debuff-resist',
+    minValue: 6,
+    maxValue: 15,
+    suffix: '%',
+    secondary: [],
+  },
+  {
+    name: {
+      en: 'Dodge',
+      ja: '回避',
+    },
+    id: 15,
+    slug: 'dodge',
+    minValue: 1,
+    maxValue: 10,
+    suffix: '%',
+    secondary: [],
+  },
+]
+
+export const overMastery = {
+  a: overMasteryPrimary,
+  b: overMasterySecondary,
+  c: overMasteryTertiary,
+}
+
+export const aetherialMastery = [
+  {
+    name: {
+      en: 'Double Attack',
+      ja: 'ダブルアタック確率',
+    },
+    id: 1,
+    slug: 'da',
+    minValue: 10,
+    maxValue: 17,
+    suffix: '%',
+    secondary: [],
+  },
+  {
+    name: {
+      en: 'Triple Attack',
+      ja: 'トリプルアタック確率',
+    },
+    id: 2,
+    slug: 'ta',
+    minValue: 5,
+    maxValue: 12,
+    suffix: '%',
+    secondary: [],
+  },
+  {
+    name: {
+      en: '{Element} ATK Up',
+      ja: '{属性}攻撃',
+    },
+    id: 3,
+    slug: 'element-atk',
+    minValue: 15,
+    maxValue: 22,
+    suffix: '%',
+    secondary: [],
+  },
+  {
+    name: {
+      en: '{Element} Resistance',
+      ja: '{属性}軽減',
+    },
+    id: 3,
+    slug: 'element-resist',
+    minValue: 5,
+    maxValue: 12,
+    suffix: '%',
+    secondary: [],
+  },
+  {
+    name: {
+      en: 'Stamina',
+      ja: '渾身',
+    },
+    id: 4,
+    slug: 'stamina',
+    minValue: 5,
+    maxValue: 12,
+    suffix: '',
+    secondary: [],
+  },
+  {
+    name: {
+      en: 'Enmity',
+      ja: '背水',
+    },
+    id: 5,
+    slug: 'enmity',
+    minValue: 5,
+    maxValue: 12,
+    suffix: '',
+    secondary: [],
+  },
+  {
+    name: {
+      en: 'Supplemental DMG',
+      ja: '与ダメ上昇',
+    },
+    id: 6,
+    slug: 'supplemental',
+    minValue: 5,
+    maxValue: 12,
+    suffix: '',
+    secondary: [],
+  },
+  {
+    name: {
+      en: 'Critical Hit',
+      ja: 'クリティカル',
+    },
+    id: 7,
+    slug: 'crit',
+    minValue: 18,
+    maxValue: 35,
+    suffix: '%',
+    secondary: [],
+  },
+  {
+    name: {
+      en: 'Counters on Dodge',
+      ja: 'カウンター(回避)',
+    },
+    id: 8,
+    slug: 'counter-dodge',
+    minValue: 5,
+    maxValue: 12,
+    suffix: '%',
+    secondary: [],
+  },
+  {
+    name: {
+      en: 'Counters on DMG',
+      ja: 'カウンター(被ダメ)',
+    },
+    id: 9,
+    slug: 'counter-dmg',
+    minValue: 10,
+    maxValue: 17,
+    suffix: '%',
+    secondary: [],
+  },
+]