Clay is important to create molds for tools and ingots, as well as Ceramic Roof Tiles. An area not having clay also means you are in a dry area, and there likely will not be easily accessible clay anywhere nearby.
粘土は屋根瓦の材料になったり、道具やインゴットの型になったりします。重要な資源なので、粘土の産出しにくい乾燥した地域に定住するのはあまりおすすめしません。
