This is part of a first-playthrough guide using the Dragon story arc. It covers both the original PSX version and the 2021 HD remaster, though some place and item names differ slightly in the latter. You can find an overview of the Dragon% path here.
The Quick Version
The quest itself is actually called “Legend of Mana,” which I guess makes it a title drop. Place the Sword of Mana Artifact you received from The Cage of Dreams, then consider picking up an NPC to help with the last few fights in the game. Larc, at the entrance to the Underworld, is reasonably strong and easy to get to.
Go to the Tree of Mana and approach its base to enter. The paths branch a bit, but it’s actually a relatively short climb to the top of the tree (“Sanctuary’s Gate”). The Sanctuary itself is a 3×3 set of rooms with stone platforms; four of the rooms have monsters. When you defeat the last of the monsters, you automatically warp to the final boss. Cutscenes and credits follow the fight, and after those you have the chance to save your game for a New Game + playthrough.
The Details (May Contain Spoilers)
Opinions vary as to how hard the final boss of this game is. I think most folks will be fine if they:
- took time to upgrade their gear at least a couple tiers beyond Menos Bronze (i.e., to Lorant/Laurent Silver or Wendel Silver)
- bring along Larc to soak up some hits and do some extra damage
- bring a pet to act as a meat shield
If you want to play it safe, it can help to back off whenever Larc is down and wait for his revive bar to fill. Most of the AoEs are telegraphed pretty clearly, and the boss’s melee attacks can be danced around.
Previous quest: The Cage of Dreams