You finished Crescent Lake, the Citadel and the Water Crystal. This picks up at Chapter 5 and goes to the end.
~1 min read
Chapter 5 · playing as Warriors of Light
The Mirage Tower and Kraken
In this chapterThe party enters the Mirage Tower and finds an ancient flying fortress.
The Mirage Tower leads to a floating fortress where the party fights Tiamat. The Kraken is defeated at sea. With all four crystals restored the party learns where Chaos is. The Mirage Tower is a high-fantasy set piece, an ancient civilisation's relic.
The Fiends are all defeated, but the story's real villain remains. The restoration of the four crystals ends the party's first quest and starts the final.
What unfolds
They defeat Tiamat, the Fiend of Air, and restore the Wind Crystal.
At sea, the party defeats the Kraken, the Fiend of Water.
All four crystals are restored.
Finale · playing as Warriors of Light
The Chaos Shrine and the Time Loop
In this chapterThe party travels back in time 2,000 years to the Chaos Shrine.
The Warriors travel through time to the Chaos Shrine. There they defeat Chaos, who turns out to be Garland, who sent himself back in time and became the villain. The Warriors break the loop, ending the cycle that Garland created. The time loop is a rare twist for an NES game. It makes the first boss and the last boss the same person, and the story circular.
Garland's motive, to become a god by looping, is a classic example of a villain's hubris. The victory restores the world and ends the series' first story.
What unfolds
They defeat Chaos, who is revealed to be Garland.
Garland sent himself back in time, creating a loop in which he becomes Chaos.