As promised, Digital Extremes is opening up the Warframe Prime Vault later this month. When the doors are thrown open on July 24 (for all platforms) Nyx Prime and Rhino Prime will once again be made available to players — either as their own packs or in one big pack that includes other Primes.
In addition to the primary Prime packs, Digital Extremes is also offering players access to a Nyx Prime accessory pack. Details on all the current packs are available on the Warframe site.