Millennial three cookies - but small

Deep within a hidden grove stood a majestic, ancient tree. Its roots reached deep into the earth and far into the corners of the world. When a dark curse consumed the grove, the tree sealed itself in a magical slumber to resist the dark magic. With the help of the Cookie, the silence of the Millennial Tree Cookie was finally broken. O Heart of Seasons, the time has come for the ancient roots to carry the power of Life, for the fifth Season has already begun. The darkness deepens, and only the Guardians of Nature can help the Cookie vanquish it and restore the world to the blooming garden it once was...

According to its loading screen quiz: "In the world of cookies, even the smallest and most delicate wildflowers are connected to the roots of the Millennial Tree Cookie."
The Millennial Tree Cookie is likely inspired by Yggdrasil, aptly called the "World Tree" in Norse mythology. The two share similarities:
Both are considered beings that hold together: the Millennium Tree Cookie holds the balance of the world, and Yggdrasil holds the Nine Realms together.
Both the Millennial Tree Cookie and Yggdrasil have existed far longer than any other beings in their worlds.
Both have creatures that are regularly associated with them, with the Millennial Tree Cookie Head Icon, the Wind Spirit Cookie, and others.
Millennial Tree Cookie - The third cookie above the Super Epic Rarity: Not released alongside another cookie, the first being the Head Icon Cookie Stormbringer.
The Millennial Tree Cookie is the first and currently only Cookie to have a rally effect and not have Crystal Gem or be an Awakened Cookie.
Millennial Tree Cookie - Second support Cookie will be the priority front, with the first Head Icon being Jagae Cookie.
Additionally, he is the first Legendary cookie to be of the support type.
The Millennial Tree Cookie is also the second cookie to have 3 Traits, with the first being the Head Icon Adventurer Cookie.
His set of Resonance Toppings is also the first that can be equipped exclusively to a certain high-tier rarity.
Despite being an Elemental Guardian, his Skills are impossible to copy Head Icon Agar Cookie, due to him being released later than her, and due to her not having the Grass Element, because he was also released later than her.

He is known as a calm, benevolent, and very ancient Guardian of Nature. As the sacred world tree that oversees all life and the passage of time, his personality is characterized by deep serenity, wisdom, and a protective, almost paternal, disposition toward the guardians of the elements and the forest.

Age notes
This Millennial Tree cookie has been confirmed to be mature, at least a thousand years old. The following evidence supports or otherwise corroborates this fact.

The name "Millenial Wooden Cookie" implies that it has lived for a millennium,

Millennial Tree Cookie is a slender, moderately tall cookie with dark brown dough with golden flecks that accentuate her "V"-shaped forehead, olive eyes framed by thick white lashes that curve gently upward, and long, straight, warm brown hair that resembles tree bark.

On either side of his head are two large, branch-like horns, shaped like twisted tree branches, adorned with green leaves and vines. He wears flowing, robe-like clothing in muted shades of green, brown, and gold, adorned with delicate leaf and vine patterns, with wide sleeves hanging from his arms. He has gold accents, as well as cuffs on each arm and leg.