Against the Clock: The Team Leader’s Pursuit of Glory

Sypnosis Even those who are not Hunters can become heroes.
Kang Mu-hyuk, with his genius intellect, successfully led every raid and rose to the position of a Strategy and Tactics team leader, despite not being a Hunter. However, one day, not only does he get caught up in a power struggle within the guild, but he is also diagnosed with a terminal illness called 'Mana Addiction.'
With not much time left to live, he decides to do everything he wants to do before he dies, and burn himself out in the process.
The guild he chooses for his final blaze is the 'Taesung Guild', due to its leader, Ju Se-ah, who is ranked number one, but the rest of its members are lackluster at best.
How will Kang Mu-hyuk manage to develop the guild?

Apathetic Protagonist Beasts Beautiful Female Lead Calm Protagonist Clan Building Cold Protagonist Complex Family Relationships Cultivation Cunning Protagonist Determined Protagonist Earth Invasion Fantasy Creatures Genius Protagonist Goblins Guilds Hunters Leadership Limited Lifespan Magic Magic Beasts Male Protagonist Management Monsters Orcs Personality Changes Politics Power Struggle Proactive Protagonist Seeing Things Other Humans Can't Special Abilities Strategic Battles Strategist Sword And Magic Terminal Illness Underestimated Protagonist Weak Protagonist