
Millenial Tree
Millennial Tree Cookie extends his roots into the earthbread and transforms into the World Tree, dealing damage to enemies. In this state, he will dispel all debuffs applied to himself and gain the World Tree HP Shield that cannot be affected by Zap or Overcurrent. Millennial Tree Cookie will also create a Sanctuary area where he will continuously restore allies' HP (except Safeguarded Cookies) and the World Tree HP Shield. Once the World Tree HP Shield is removed, the Sanctuary effect will weaken. Also, Millennial Tree Cookie will scatter Sacred Seeds at certain intervals, dealing damage and restoring his own HP or his World Tree HP Shield. After the end of the World Tree's duration, Millennial Tree Cookie will inflict the Equilibrium debuff upon the enemy from whom he received the greatest amount of damage during his transformation.
If there are no enemies around Millennial Tree Cookie during his transformation, it will automatically cancel, and a portion of the remaining duration time will be deducted from his skill cooldown.
If there are no Defense Cookies on the team, Millennial Tree Cookie will use Nature's Protection.
As the source of all elements, Millennial Tree Cookie gains the Elemental Seer buff if there are Cookies of 4 or more different elements on the team. Also, during his transformation, he will grant the Elemental Force buff to the team. If the Cookies are the Guardians of Nature, they will receive a stronger Elemental Force: The Guardians buff.
At the beginning of the battle, Millennial Tree Cookie will gain the Majesty of Eons buff.
- World Tree: 10.0 sec
- World Tree Single-hit DMG: 102.4% of ATK, ignores 35.0% of target's DMG Resist
- World Tree HP Shield: blocks damage equal to 100.0% of own Max HP for 15.0 sec
- HP Shield Restoration: 100.0% of Healing received from Sanctuary and Sacred Seeds
- Healing: during transformation, heals team for 0.6% of own Max HP every 0.5 sec
- Weakened Periodic Healing: during transformation, heals team for 0.5% of own Max HP every 0.5 sec
- Sacred Seed: deals 6 hits over 2.3 sec: 17.0% of ATK + 15.5% of Max HP (Cookies) / 11.5% of ATK (Others) per hit, ignores 35.0% of target's DMG Resist
- Sacred Seed Healing (Self): 2.0% of Max HP per tick
- Nature's Protection
- Taunt & Debuff Resist (Self): 20.0% sec
- Sheltering Branches: team's DMG Dampening +20.0%, DMG Resist +35.0%, Amplify Buff +25.0% for 15.0 sec; stacks up to x1
- Blessing of the World Tree: during transformation, team's ATK +12.5%, DMG +20.0%; stacks up to x1
- Weakened Blessing of the World Tree: during transformation, team's ATK +10.0%, DMG +15.0%; stacks up to x1
- Equilibrium
- DMG: 855.7% of ATK, ignores 35.0% of target's DMG Resist
- Equilibrium: dispels all buffs, prevents Healing for 6.0 sec, DMG received +44.5%; stacks up to x1
- Elemental Seer & Elemental Force
- Elemental Seer: Cooldown: -25.0%, Max HP +35.0%, DMG Dampening +37.5%, DMG Resist +30.0% Sea Fairy Cookie, Stormbringer Cookie, Frost Queen Cookie, Wind Archer Cookie, Fire Spirit Cookie, Millennial Tree Cookie, Moonlight Cookie: ATK +12.0%, CRIT% +10.0%, CRIT DMG +15.0%, DMG +20.0% for 15.0 sec; stacks up to x1
- Others: DMG +15.0%, DMG Dampening +25.0%, CRIT DMG Resist +35.0% for 15.0 sec; stacks up to x1
- Divine Seed: deals 6 hits over 2.3 sec: +47.3% of ATK + 23.5% of Max HP (Cookies) / 12.8% of ATK (Others) per hit, ignores 35.0% of target's DMG Resist: DMG taken +15.0% for 15.0 sec: stacks up to x1
- Divine Seed Healing (Self): 15.0% of Max HP per tick
- Majesty of Eons
- Debuff Resist: +30.0%
- CRIT DMG Resist: +35.0%
- Cooldown +1.0% per 2.0% HP gained from Beascuit bonus effects (capped at +15.0%)
- Skill DMG Resist Bypass +1.0% per 1.0% HP gained from Beascuit bonus effects (capped at +30.0%)
- Rally Effect
- Legendary Tree
- The World Tree grows larger with each Legendary Cookie on the team; Team's DMG Resist +7.0%, Healing +5.0%; stacks up to x7

