An anvil is a block in Minecraft that can be used to repair and rename items. It can also be used to combine two items to create a new item. One of the most useful items that can be created with an anvil is a light.
A light is a block that emits light, which can be useful for illuminating dark areas or creating decorative effects. Lights can be crafted using a variety of materials, but the most common method is to use glowstone dust.