Inside the Water Vein Hall.
An enormous water chart of the Northern Sea hung in midair.
Countless blue lines represented its various water veins, cold currents, and warm currents.
Ao Lie stood before the chart.
Dozens of jade slips were already piled in front of him.
A Guixu cultivator responsible for recording changes in the waters wore a grave expression.
"Hall Master, the first ice melt appeared near the Thirty-Fourth Post Station."
"Later, the same phenomenon was discovered around the sixteenth, twenty-seventh, and forty-first Three Lives Post Stations, one after another."
"This morning, even the water temperature outside the Northern Darkness Dao Palace rose."
Ao Lie said nothing.
He raised his hand and pointed at the chart.
A strand of Dragon Clan Water Art sank into it.
Hum!
The entire Northern Sea was immediately divided into countless tiny regions.
The temperature changes gradually became visible.
The deepest blue represented extreme cold.
The paler the color, the higher the temperature.
Within mere breaths.
Ao Lie's brow furrowed.
The entire Northern Sea.
Was warming up.
Though the increase was not yet dramatic.
Its sheer extent was outrageous.
Such a change could never have come from a single formation or magical treasure.
Ao Lie asked, "Have any mighty fire cultivators entered the Northern Sea recently?"
The cultivator below shook his head.
"The Bureau of Cause and Effect checked. None."
Ao Lie continued, "What about the undersea fire veins?"
"They're all very stable."
"Has anything changed at the Ruins Sea Eye?"
"It's stable as well."
Ao Lie pondered for a moment.
"I'll take a look myself."
A short while later.
A streak of golden dragon light left the Northern Darkness Dao Palace.
Ao Lie first headed to the nearby Cold Tide Waters.
He had only just arrived.
When his expression changed.
It was far