Beginning of the universe ----->Hive emerge from evolution, creation, or another universe----->Leaders become biologically immortal, Hive go back in time and pollinate primordial worlds around the universe with Hive--- Darkness consumes universe, Hive thrive --- near the end of the universe the Darkness sends the leaders of the Hive into the distant past to hibernate in secret. Gifting the Hive leaders "DURABILITY" and making them lesser gods. The Crota in The Wakening is a future version of Crota, the law of continuity prevents Guardians from truly killing Crota in the present or past until they prevent future Crota from causing any effects. Even if present Crota is in another dimension, immune to our fluctuating continuity, future Crota can merely take past Crotas place if we kill him. When we kill present crota, the future crota we killed becomes a hologram, a collection of virtual particles existing for continuities sake, a philosophical zombie because we prevented his future. Had future Crota significantly affected the past, then he may have been more durable, and significantly harder to unravel. Crota and his ilk are nothing compared to the old gods: Darkness, Light, Balance and Fate.