Through the samadhi of thusness, death can be transformed into or purified as dharmakaya, a practice that is unique to tantra. Although sutra also practices emptiness, it does not have the power to purify, only to eliminate defilement, because it lacks the tantric view. Another function of the samadhi of thusness is to destroy the view of eternalists. For in the subsequent practices, all the mandalas of the buddhas are also perceived to be of empty nature; nothing exists permanently. Therefore, the samadhi of thusness is able to abolish the eternalist view.

~Depicted from GATEWAY TO VAJRYANA PATH - The Generation Stage