Ocean Portal
Ocean Portal
Portal
A stable way back to the Ocean Monument. Stack villagers and a Prismarine Shard on it, then right-click.
How to Get It
Made From
Uses up Cobblestone, Diamond, and Prismarine Shard.
Learned by winning a run through the Ocean Gateway.
Using It
Each run costs a 
Prismarine Shard and takes your villagers back to the Ocean Monument and the 
Elder Guardian.