Minecraft Dungeons & Taverns Data Pack - Conduit Ruin - it's a mystery to me! Needs further investigation. Oxidized copper blocks and looks like an expanded ocean ruin.
"A way to teach player how to build a conduit with hints in the chest in the prismarine ring as well as being an archeological site" modrinth.com/datapack/dungeon...
Minecraft 1.20.4 single player, using commands, survival and creative, peaceful, normal & hard mode.