These are huge voyages that span the world and progress in difficulty. These main quests are far more linear and dramatic than a power-up raid, and their completion can take months. One thing of true fun is each clan has a unique Legendary Quest. These may take you a month to finish due to the difficulty. In some cases, if you are successful, we will erect a statue in the game of your character.
Some quests give huge bragging rights while others give awesome relics and power-ups.
One cool snippet from a Legend Quest is the construction of a towering tuning fork. You can use it in the underworld to open the SonicGate to the next zone. The story involves the elements to make the tuning fork, and the recruitment of the wacky band of blue midgets required to assemble it. There's just too much to list. Yes, yes, and yes.