The Great Tree is a location in Rapunzel's Tangled Adventure. It used to be Zhan Tiri's stronghold when he corrupted it with dark magic and Lord Demanitus rendered it dormant by throwing an enchanted spear into it's heart.
Eons ago, the Great Tree was once a sentient being and a force for good, until it was soon corrupted by the evil warlock Zhan Tiri and made the Tree his stronghold and destroyed any who approached it. Ultimately, Zhan Tiri's reign over the Great Tree came to end when Lord Demanitus used a magic spear and threw into the heart of the tree, rendering it's corrupted magic dormant.
Many Years later, Hector, a member of the Brotherhood was sworn to remain at the Greet Tree as his domain to ensure no one crosses through it to reach the Dark Kingdom.