UPDATE 10/5/18: Following its launch on PC last month, Warframe's Beasts of the Sanctuary content update is now available to download on Xbox One and PlayStation 4.
Beasts of the Sanctuary introduces the new Sanctuary Onslaught mode and the Warframe Khora, both of which are outlined in more detail below.
Alongside the new update, console players can participate in the returning Operation: Plague Star limited-time event, which runs from today, May 10th, to Tuesday May 22nd.
"The infested boil that once threatened the Plains has grown back, uglier and more putrid than before," explains developer Digital Extremes in a bout of scene-setting, "Vay Hek possesses a toxin that can destroy the boil at the meteorite crash site, but he refuses to help […] get ahold of his toxin and destroy the boil before it becomes unstoppable."
In practice, that requires you to complete a series of Bounty Missions (speak to Konzu in Cetus to begin), to earn Operational Supply Standing that can be used to shop for Event Rewards. Details of the event (from its PC appearance last month) can be found on the Warframe website.
ORIGINAL STORY 17/4/18: Developer Digital Extremes has announced that Warframe's latest free update, known as Beasts of the Sanctuary, will launch on PC later this week. It's due to arrive on Xbox One and PlayStation 4 in May.
Beasts of the Sanctuary contains two key additions. First up is Sanctuary Onslaught, a survival mode that pits players, either solo or in squads of up to four, against increasingly difficult waves of opponents in order to pass from portal to portal and recover the missing Khora Blueprints. It can be accessed by talking to Cephalon Simaris at the Sanctuary in the Relay.
"Enter the portal to test the limits of your power against the battle-hardened beasts of the Sanctuary. Work together to survive the odds and recover the remains of a shattered Warframe", is how Digital Extremes explains it.
By surviving the Sanctuary, players will be able to gain access to the update's second new addition - Warframe Khora. Khora is described as a "versatile dynamo of offensive and defensive power". She wields a metallic whip that can strike enemies from a distance, and commands the cat-like Kavat that "quickly engulfs enemies in a whirlwind of pain".
More information on Warframe's Beasts of the Sanctuary update can be found over on Digital Extremes' website. You can also catch a glimpse of Khora and the new Sanctuary Onslaught mode in action via the latest developer video above.