The Jedi Tree, a Force-sensitive uneti tree of great age, stood on the Temple Island of the planet Ahch-To. This tree, revered for centuries, had once been enormous. However, by 34 ABY, it had deteriorated into a moss-covered, aged shell, featuring an opening created by the elements and the passage of time. Surrounding a massive central trunk were three fleshy shoots, their tops fractured like uneven crowns, devoid of leaves or limbs. Moss was the only growth visible on its gray bark. A staircase provided access, connecting the first Jedi Temple to the tree. Following Rey's departure from Ahch-To to the Crait system in 34 ABY, Skywalker tried to incinerate the tree. However, the Force spirit of Yoda intervened, calling down a bolt of lightning that ignited the tree. Soon after, Skywalker wrote about the Jedi Tree in The Secrets of the Jedi, a book where he documented the history of the Jedi Order.