A link between eras.

...How did the Krigans become the way they are? Why are fire and molten lava so appealing to them? We can only judge this based on fragmented information. It is said that on their home planet, the temperature of the core once began to rise. It increased every hour, and the Krigans had to change. They were almost all-powerful, but they did not want to interfere with the processes of their planet, preferring to change themselves. Since then, fire means nothing to them, and they themselves have become part of the fire...