The Tree of Harmony is one of the most mysterious things that exist in Equestria. How long has it existed, why has it existed, and most importantly: Is it aware?
A Side Story to the Guardian of Legends series. After a young colt fails to save his mother from an illness that took her life, he sets out to become a Guardian to someone he cares for, no matter the cost.
An ancient evil that was thought to be sealed several centuries ago, has returned and is bent on consuming all of the Equestrian world and its alternate dimensions, and it is up to a Guardian from another world to save this dimension.
This alternate story to GoL - Unity shows what if the young sage garbed in crimson was to return to Equestria after thousand years passed, or roughly six months in his perspective since the defeat of the ancient evil known as Vexis.