Infant Island is the home of the miniature Shobijin Priestesses and the guardian of Infant Island, Mothra, whom they serve. The first appearance of the island is in the original Mothra film from 1961.
So now that you know a little bit about Infant Island, you may be wondering how you get there. Well, it really is a simple (but can be a time consuming) process.
First off, you need to make an Enchanted Map. For info on how to make it, visit the Crafting Recipes section of the wiki. Next, you need to find an Ancient Temple which spawns in an Ancient Forest. They are no too hard to come by, it really just depends on your world (like if you are using the world type - Kaiju Land).
Once inside the
Ancient Temple, you
need to head over to
the Infant Island
Relic, right-click it with the Enchanted Map, and it will give you an Infant Island Map. Take this, and right-click at the bottom of an ocean (or deep ocean) biome and you will be teleported to the island!
At Infant Island
Now that you've made it to Infant Island you ask yourself, "What now?" Well, the main thing you want to do is find the Shobijin. They spawn in a small cave on the surface. (Hard to Find)
Once you find the cave, there will be wall paintings and a tablet in stone. Right-click that tablet and the Shobijin appear with your first mission!