The secret of the ancient Magi

The true strength of a Magus did not lie in his abilities or the strength of his spells. The true measure of a magus's strength was his mage tower. 

Every Archmage had to have a mage tower , under whose domain , they would be the supreme ruler. 

Usually these mage towers were tall structures , that contained rooms for experiments for the Magus inside as well as some special offensive capabilities as a structure. The sepcial combat abilities being the likes of a large flamethrower that could put dragon breath to shame , or things like constant ringing sonic sounds and the like. 

However , these magic towers were still nothing compared to the ancient times where the OmniMage Zeus , ruled the continent. 

His mage tower was special , as it had a mana gathering property. A special design that allowed the entire area around the mage tower to be full of ambient mana boosting the potential of every mage inside it.