This achievement is going to be a bit of a grind to get. You have been warned!
For this achievement you will need to craft the Conduit first in order to activate it.
You will need:
- Heart of the sea, which can be obtained from the chests that is inside the sunken ships. You only need one of these.
- Nautilus shells, which can be obtained from “the drowned” the new kind of mob within the update. You can also fish to get these shells however it is a little faster to kill “the drowned” mob. You need 8 of these.
Once you have collected all of that go ahead and craft your Conduit.
The next thing you’ll need to activate the Conduit is prismarine blocks, you can use whatever type of prismarine blocks. Not sure if there is any other way to get these kind of blocks, but I know you can get them from the ocean monument. Which is a pain to find.
With these blocks you need to make “rings” around the Conduit in order for it to activate. Not sure if you only need 1 “ring” for the achievement or if you need more “rings”.
The Conduit needs to have 5x5 space of water, because it will grow in size. Once it is in water and has the space it needs, start adding “rings” around it.
Here is a link to a video that I watched in order to see how the Conduit was built.
Video is not mine, credit goes to the original owner of the video :)
(not sure how the link is going to work but it’s there)
You may have to skip through the video a little to see how it is built. If anyone has finished this achievement and there is something to add, just comment and I’ll edit this solution.