Plot-relevant things we learned from the green dragon:
- The lichgon was sealed on the island because if you destroy it’s body it will just come back. You need to destroy it’s soul but they had no way to do that.
- There were extra-big elder dragons of each colour, it appears the lichgon was the white one that went rogue. The others provided the magic to seal it up.
- I don’t remember their names. Apparently they’re all still alive though.