Leviathan, Eater of Worlds

Leviathan, Eater of Worlds is a Raid Lair in Curse of Osiris. Guardians will return to The Leviathan, the ship of Emperor Calus and site of the Leviathan Raid, but instead of exploring the ship's palace, they will venture deep inside the vessel itself to battle a new threat. The Guardians will attempt to defeat Argos, the Planetary Core (unknown but implied it is the core of Nessus). Leviathan, Eater of Worlds has a recommended Power Level of 300.

Unique Enemies

 * Loyalist Gladiator

Bosses

 * Argos, Planetary Core

Embarkment
Upon transmat back to The Leviathan, players will approach the first door seen. Now unlocked, it will open and allow the fireteam to venture into a deeper segment of the ship. As they progress, player will have to jump through holes in a giant gear blocking their path. Failure to jump through one of the holes at the right time will result in death. Once they pass this, they will leap even deeper into the ship and land in the ship's reactor.

Reactor Room
To proceed through the reactor, players will have to cross a series of platforms that rise out of the coolant. Only one player can be on any single platform at a time. If more than on player is one one, it will sink into the coolant, resulting in death unless they can reach an unoccupied platform or return to the nearest waypoint. Once the first platform has a Guardian on it, the next platform will rise and the leading player can jump onto that one while another jumps onto the previous platform. The cycle will be repeated until the platforms lead to a waypoint. Along the way, Psions will appear and try snipe at you: it is best to simply dodge in order to avoid missing your window to reach the next platform. Note that there is a time limit to cross the platforms: if time runs out, the reactors temperature will rise, retracting all of the platforms and wiping everyone on them. Once the waypoint is reached, a squad of Loyalist must be defeated before proceeding to the next set of platforms.

For the second set of platforms the fireteam must split in two, with three Guardians using the path on the right and three using the left. The third set of platforms requires this split to occur halfway through the path, so placing an experienced player in the fourth position is advised. For the fourth and final set of platforms the path becomes much more complicated, and players will often have to jump over one another to reach the next platform. Simply keep your eyes fixed on the person in front of you and pay attention to where they jump.

Once the team makes it past the four series of platforms, they will have to fend off several waves of Loyalists that appear on both sides of what becomes the battlefield. The team must dispatch each wave until four Colossi arrive. Once they have all been defeated Calus will call off the attack and open a hatch leading deeper into the ship. The lair's first loot chest will appear in front of this hatch, and once collected the fireteam can progress further into the Leviathan.

Delve Deeper
To proceed through the next room players will have to pay attention to the large pistons overhead. When these pistons fire, all of the exposed players not protected by shielding walls on the path ahead will be killed. In order to progress, players simply have to make their way from wall to wall while the pistons are retracting. Pay attention to audio cues in order to arrive safely at the next area.

After entering a long cylindrical tunnel, players will be propelled out into a large open area where they have to avoid debris and land safely on the platform below. Using jumps is essential to avoiding a fatal contact with the floating debris. In order to unlock an additional reward chest, the players must fly through six rings on their way down: each ring is highlighted in red if it has not yet been passed through. There are three rings to the left of the arena, and three to the right. If a fireteam fails to make it through every ring before reaching the platform below, they can reset by jumping off the edge and respawning at the tunnel above. Once these rewards have been claimed, progress over the platforms ahead and down to the first Argos encounter.

Rewards

 * Emperor Calus Tokens
 * Belly of the Beast Emblem
 * Calus's Elite Shader
 * Raid Lair-specific armor sets
 * I Am Alive - Grenade Launcher
 * Zenith Of Your Kind - Shotgun

Trivia

 * Leviathan, Eater of Worlds is the second Raid activity to involve fighting more than one enemy species, but the first to involve fighting two species that are enemies of one another in the same raid.