sentences:  It was discovered shortly thereafter that the planet housed a massive, globe-spanning mechanical system called the Great Machine, which was failing due to the terminal health of its supervisor, a lone alien named Varn.Because the Great Machine required a sentient mind to function as its central operating system, Varn's declining health was causing systematic failures that threatened the planet's integrity.Draal, reinvigorated by a sense of purpose and the opportunity to assist others in a way he no longer could on Minbar, gladly and willingly offered to take Varn's place as the custodian of the Great Machine.