A fire.
Effects Can be used for crafting, cooking, and can also produce light.
Type Building object
Fire is mainly used for cooking meat and fish, but it can also be used to craft certain items.

To build a fire, go into the build menu. Click on the fire icon, then click a marked adjacent tile to light it there.

To cook meat or fish on it, drop it on top and wait until it turns brown. If you wait too long, it will burn.

To craft a torch, drop a piece of wood on it. It will turn into a torch.

Fires will burn out after time.