Each use of Dragon Breath consumes energy stored in a unique organ within a Giant Dragon's body. This energy is not Magic Power, and it recovers extremely slowly.
From his vantage point on the dragon's back, Levi watched the Demons ebb away from White Bone Fortress like a tide and slowly breathed a sigh of relief.
In truth, White Bone Fortress was a military stronghold; a single breached gate should not have been enough for the Demons to overrun it completely.
However, those Six-armed Snake Demon Warriors were simply too formidable. The rank-and-file soldiers were no match for them, which was why the situation had devolved into a desperate mess so quickly.
Had it been just a horde of Low Tier Demons, they would have been driven out by the responding defenders even if they had managed to charge through the gate.
