Minecraft wiki entry for Achievement_guide, associated text: An easy way to obtain this achievement is by killing the wandering trader, so you will get 2 lead with 2 tamed trader llama, leash one and another trader llama will form a caravan, for more llama you can wait for another wandering trader or go to mountains or savanna biomes, you can also breed regular llamas as baby llamas are also counted towards caravans (the trader llama cannot breed). The llamas don't need to be tamed. If you cannot find a lead, you can craft it using string and a slimeball.