The Tale of the Tornado

"a Binding Coil of Bahamut Story about the Hidden Mechanic, none knows, and many described as bugged or addressed as RNG."

Five where needed to unlock
Five where needed to complete
Only one holds the lock
and only then comes defeat
- 5 Parts of your Relic Quest where needed to unlock coil
- 5 Parts (Turns) in Coil is needed to complete coil

And here comes the evidence, it is indeed a puzzle.