Elder Guardian

The Elder Guardian is a hostile mob which only spawns underwater in ocean monuments. It is a stronger variant of the Guardian.

Spawning
Three Elder Guardians spawn naturally during the generation of each ocean monument. They will not respawn after their initial spawn, thus there are a limited amount of them per world. Elder Guardians spawned with monuments do not naturally despawn, although they will be removed along with other hostile mobs in peaceful difficulty.

Drops
The Elder Guardian drops 0 to 1 prismarine crystals, 0 to 2 prismarine shards, and 0 to 1 raw fish. If killed by the player, it also drops a single wet sponge.

The Elder Guardian has a 2.5% chance of dropping a rare drop when killed by the player. The chance of which fish you get is identical to catching fish: 60% chance for raw fish, 25% chance for raw salmon, 2% chance for clownfish, and 13% chance for pufferfish.

Looting increases the maximum prismarine shard drop by one per level. The chance of getting a raw fish drop is 50% with Looting I (2/4), 60% with Looting II (3/5), and 67% with Looting III (4/6). The chance of getting a rare drop is also increased by 0.5% per level.

The prismarine crystals drop will only happen if the common raw fish drop fails, with the same chances as the raw fish drop. This works out to a base chance of 22% (2/9), Looting I giving 25% (4/16), Looting II dropping down to 24% (6/25), and Looting III giving 22% (8/36), or the same as the base chance.

Behavior
Elder Guardians do not swim around as much as normal Guardians, however they act the same as regular guardians on land. Guardians will swim away when approached by a player it is targeting.

Their eye will follow and stare at any nearby players, and will always look directly at who they're attacking. Elder Guardians' eyes will still follow a completely unarmored player under the effects of a Potion of Invisibility, but this is entirely visual and they won't attack them. Elder Guardians will still attack squids under that same status effect though.

Elder Guardians will attempt to target both the player and squids.

Combat
The Elder Guardian has a few methods of attack, including firing its laser, inflicting mining fatigue, and a thorn-like attack.

The laser takes several seconds to charge, doing no damage in the meantime, and changing from purple to bright yellow. Once charged, the beam abruptly ends and deals damage. The Elder Guardian will swim around for a few seconds before firing again. If the target comes near the Elder Guardian while it is firing its beam, it will stop firing and swim away until it is at a comfortable range, at which point it will continue attacking. The beam cannot be dodged, and has a maximum range of approximately 14 blocks. Once the player is out of range, or if the beam is obstructed by solid blocks, the Guardian's beam will disengage from the player, and deal no damage.

Once each minute, the Elder Guardian will search for players in a 50-block radius who are not afflicted with Mining Fatigue, who are afflicted with a level of fatigue lower than III, or whose affliction will wear off in less than one minute. The players found will be inflicted with Mining Fatigue III for 5 minutes, and a ghostly image of the Elder appears to the player.

The Elder Guardian will deal 2 hearts of damage every time it is hit when its spikes are extended. If cornered, the Elder Guardian will usually extend its spikes and fire at the player, even at point blank range.

Trivia

 * Elder Guardians can be spawned using.
 * Using only will spawn an Elder Guardian with 30 HP, the same HP as a normal Guardian.
 * The Elder Guardian's eye is actually the "head" part of the mob's model. This gives the illusion of a dynamic eye.
 * Guardians can actually be converted to elders with the /entitydata command, by adding the {Elder:1} NBT tag.

Gallery
pt-br:Guardião Ancião Древний_страж 远古守卫者