Monument Fonders

Monument Fonders is a secret level in the Minecraft Dungeons Ocean DLC. Here are it's drops:
Prismarine Drout(adventure)
Washing Wisdoms(adventure)
Impaler
Impale Slayer
Phantom Armor(adventure)
Grim Armor(apocalypse)
Artifacts:
Water Staff
Gong of Weakening
There is no boss but an elder guardian can Spawn as a miniboss sometimes