In the end, Charles still made this decision.
He would first build a simple mana pool to supply energy to the wizard tower.
After making this decision, Charles slightly altered and optimized the wizard tower's rune arrays.
If the mana pool was to supply the consumption, then first, there needed to be a source that could steadily accumulate mana for it.
Charles quickly had an idea for that source: the surrounding volcano cluster.
The volcano cluster was rich in mana and served as the energy supply for the entire fortress.
Charles then refined more metal pillars and handed them to the Greater Demons under his command, having them install the pillars beneath the surrounding volcanoes.
The purpose of these pillars was to draw in mana and gather it in the mana pool within the wizard tower for consumption.
At the core of the wizard tower, Charles built a massive mana pool spanning ten meters in diameter.
The surrounding fire mana would ultimately converge at this location.
At this moment, the surrounding energy had already begun to gather.
There was a rune array within the mana pool, and the mana was now slowly accumulating.
It began as layer upon layer of mist, gradually turning into a faint red liquid.
This liquid was fire-element mana, and it continued to accumulate.
The more fire-element mana accumulated, the more the elemental mana below gradually became compressed.
This compressed mana could not only supply the wizard tower's consumption, but could even be sold as a resource.
With only a little adjustment, these solutions could become excellent mana-restoration potions.
However, Charles clearly had no interest in that money right now.
He had built the mana pool for only one purpose: to deal with crises that might arise.
If Anog or Kolsama wanted to devour Charles, then