Invincible in the Tutorial - Episode 2

During a chaotic battle, a man mutters "I'm actually invincible" as enemy fighters keep attacking him. Instead of fleeing when others shout to run, he moves straight toward the demon commander. Soldiers panic while he charges with a wooden sword. Observers react and someone yells, "System, don't mess with me!"—then the unthinkable happens: the demon commander falls dead. The sudden death overturns expectations, leaving the protagonist and witnesses stunned and confronting an impossible outcome with no answer yet for how the commander was killed.