Final answer:
The 8th limb of Yoga according to the Yoga Sutras is called samadhi, which is the state of oneness and union with the self and true reality.
Step-by-step explanation:
The 8th limb of Yoga according to the Yoga Sutras is called samadhi. Samadhi is the state of oneness and union with the self and true reality, often referred to as the supreme soul. It is the ultimate goal of practicing Yoga and can be achieved through deep meditation.