silent_walker

The Maha Tower or The Broken Tower of Omega—some call it. It is a place of Dream, a place of myth, and a place of Chaos. Only a thousand among many get the chance to climb it each year.
Wrik spent years to find this tower, ignoring his studies, University, but to no avail. Until a day when a letter came to his door with a pair of tickets to the tower.
But before that, he had to appear in gruesome trials to enter the cruel Tower.

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Check out the other works: 
Chaos Cycle: The Eye of Genesis.
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[The novel is a bit slow compared to other webnovel. It picks up the pace from the 10th chapter or so.]

Broken Tower Saga : The First Swordsman

"How does the room work, actually?" Jacob couldn't help but ask. "And how will this be helpful in our training?"

"The entire room was actually scribed with runes that detect any types of Maha Mana Manipulation, and make it harder to get a hold of your ability," Sophia continued. "More importantly, its artificial intelligence-driven, so it's difficult for everyone even if you're well-adapted in Mahasaying. Meaning, the harder it gets, the higher you go."

"But how will it help us?" Jacob frowned. "Other than making it harder for us to control?"

"It will help you in adapting to difficult situations. Not everywhere you would find such an atmosphere to manipulate mana like the trial. Besides, who said your enemy would give you time to adapt to the environment?" Sophia said, "Alright, no more small talk; get busy."

They all started the meditation again, closing their eyes. And the mana fled again when it came in contact with their consciousness.

Mana Training