"Thunder Strike!"
"Tornado!"
"Chain Lightning!"
"Cyclone!"
John and Douglas exchanged magic spells left and right, causing the mana in the area to become more and more unstable.
When the mana in the air became too unstable, the audience began feeling a little nauseous, which is a common occurrence during such a phenomenon, and it was called mana sickness.
Though, the mana disturbance was being contained within the fighting area through magic, so it wasn't too bad.
And almost as though they were showcasing their magic spells, both participants started with Tier 1 magic spells before going up in tiers.
Eventually, they started bombarding each other with Tier 5 magic spells.
"Lightning Cannon!"
"Tornado!"
A concentrated beam of lightning shot out from John's wand, colliding with a tornado that threatened to shred everything in its path.