The eldest of them all

is a boss that appears at its ruins. has 350 hp, deals 7 damage and its element is water.

Appereance
its a guardian except is way bigger than the elder variant, has a grey eye

Attacks
Laser: shoots a laser like all guardians

streaming: pushes you away

fin-ale: attracts the player while spinnning fastly

on hard mode he is being scolded by 2 guardians

Drops
guardian eye (3-4)

Exp (10 levels)

water scale (guaranteed)

random fish (10%)

trivia/backstory i guess

 * He is 582 years old
 * He is responsible for the guardians's hate towards the squids, mainly because their ink sacks are useful for the dark prismarine
 * he got his royal ruins by raiding some villages
 * He destroyed all sources of prismarine and sinked complete stone villages