Out of Magic? Then I'll Turn into a Behemoth

When another world descended, the “Silent Zones” began devouring the world. As humanity teetered on the brink of extinction, people discovered the existence of “magic essence.” The age of universal magehood began. Yet humanity continued to lose ground against the creatures of the “Silent Zones,” until a great hero with the talent “Body of Ten Thousand Arts” appeared. Guarding a rift in the void alone, he turned the tide. Thus began the glorious age of human mages. At the joint aptitude assessment, Xia Yuanbai stared blankly at the pillar of light shooting up from his body. 【Body of Ten Thousand Arts: Increases the power of any element used by 300%, increases mana consumption by 300%, and increases base mana by 1,000%.】 Three times the power for three times the cost. That meant he was basically getting a tenfold increase to his base mana for free. But the reason Xia Yuanbai was stunned wasn't the incredible bonus from Body of Ten Thousand Arts. It was the words that appeared afterward. 【Otherworldly Taboo: Dark Star Devourer. When the user's mana is depleted, the world will behold your true form.】 【Talent: Astral Body. Your body can grow without limit, crushing stars beneath it.】 【Talent: Devour. Consume flesh, mana, and anything else beneficial. (Adaptation, evolution, mutation!)】 【The effects of revealing your true form are determined by the amount of mana consumed. Recovering your mana will make you revert from your true form.】 Xia Yuanbai was truly stunned. Before transmigrating, he was just a student. How had he become a taboo-level destroyer beast? “Does being a student make me a beast too?” When the high costs and high stats of 【Body of Ten Thousand Arts】 met the 【Dark Star Devourer】... When I meet an opponent, I can just unleash a saturation attack right away. If they're still alive after I run out of mana... I'll just slap them to death.