Minecraft wiki entry for Survival_in_an_infinite_desert, associated text: Using the emeralds from the villager trading, you can buy useful resources from the wandering trader. The best things are flowers, dyes, sugar cane, red sand, kelp, coral blocks, saplings, plants, podzol (for renewable dirt), slimeball, packed and blue ice, etc. Do not buy a nautilus shell because there is no heart of the sea to make a conduit.