Kuudra

Kuudra is a Boss in the Crimson Isle. Kuudra Keys are used to open chests from the Kuudra fight.

The Kuudra fight only allows 2-4 players at a time, similarly to Dungeons. However, you gain much more Crimson Essence from paid chests as opposed to dungeon essences, and much less Crimson Essence from free chests as opposed to dungeon essences.

Appearance
The Kuudra is an enormous Magma Cube around 3 times bigger than the Magma Boss with 1 big eye in the middle. Its 4 tentacles are not directly attached to it and also protrude out of the lava nearby. The tentacles are the result of upside down Withers around the size of the Wither King. The Kuudra is pouring with lava and has 2 other Magma Cubes on its 2 front corners.

Tiers
Multiple Tiers of Kuudra can be fought, with each having different requirements and costs. Higher tiers increase the difficulty of the fight, but give better loot.

Currently, the Infernal tier is unavailable. Completing a Kuudra Tier for the first time rewards the player with.

Boss Fight
After starting the Kuudra boss fight, will fish up Kuudra. The players have to mount Cannons placed along the edges of the center platform, and shoot at Kuudra and its Tentacles, while other enemies attack them. Different mobs will spawn on the platform, and will attack nearby players. Shooting the tentacles grows more and more difficult, as the players have to work as a team to kill the mobs spawning on the platform. However, shooting the tentacles will give the players, which can be used to buy different Cannon upgrades, which each have a special and unique effect.

If a player dies during the fight, they will become a Spectator, similarly to Dungeons, and can be revived by their teammates.

There are multiple attacks Kuudra can use, which can occur every 90 seconds:
 * (All tiers): Whilst players are on the platform, attacking the tentacles, occasionally spawn. They will kill all players 35 seconds after they spawn unless they are defused. They spawn on each of the four small floating islands above the center platform, and also on the center platform. To defuse the bombs, players must use a certain amount of  near them. The amount of  required to defuse the bomb is displayed above it. The players gain  after defusing all bombs.
 * (Hot tier): Multiple Wandering Blazes will spawn on (1st phase)/float to (2nd phase) the platform and begin to attack the players. They can only be damaged by the Cannons.
 * (Hot tier): 1 (1st Phase)/2 (2nd Phase) Ghasts with TNT blocks will fly towards the platform and drop the TNT block, which will cause the players to lose the fight. The Ghasts must be killed to prevent them from dropping the TNT. They can only be damaged by Bows (1st phase)/Cannons (2nd phase). The players gain after killing all Ghasts.

Orbs will sometimes spawn throughout the fight, and float towards the Tentacles or Kuudra. They give positive effects when shot with Cannons, but give negative effects if the reach Kuudra.

Mobs
Different mobs spawn on the platform at specific times whilst the players are fighting Kuudra. They start spawning randomly at (Basic tier) or  (Hot tier). They are flung up from the lava onto the platform.

Basic Tier
In the Basic Tier of Kuudra, the fight is completed after defeating all 4 Tentacles.

Hot Tier
In the Hot Tier of the Kuudra fight, once all 4 Tentacles are defeated, Kuudra will spawn, and revive all of its tentacles. The players will have to defeat Kuudra and its Tentacles, which are revived after a certain amount of time after being killed. After defeating Kuudra and its tentacles, the fight is completed.

Reward Chests
If every player fighting Kuudra dies, the fight will end, and the players will get access to the Free Reward Chest. If Kuudra is defeated, the players will be able to access the Paid Reward Chest, requiring the Kuudra Key for the Tier of the boss fight to open. Equipment variants from Reward Chests are dependent on the boss fight tier. The level of Enchanted Books from Reward Chests is dependent on the Tier of the boss fight. Level I Enchanted Books can be obtained from the Basic Tier, Level II from the Hot Tier, Level III from the Burning Tier, Level IV from the Fiery Tier, and Level V from the Infernal Tier.

The free chest contains an Enchanted Book if the fight was completed, and an Attribute Shard if the fight was  completed.

Trivia

 * Kuudra's main body is actually two Magma Cubes facing the opposite direction of the central island.
 * Kuudra is the final Factions Questline, so after defeating it, the Questline has come to an end.