When the total number of villagers in your village (i.e Woodland) reached 15, your villagers will start asking for the Limestone Fire.

The Limestone Fire is used to keep your villagers warm and safe from predators; this fulfils a need in order to keep them carefree.

The Limestone Fire takes 3 days to unlock, and 2 days to build. This requires 50 Limestone blocks and a Bronze Hammer.

The Limestone Fire will burn for 4 hours, and requires 12 Elm planks and 2 Flint Shards to light it.

By adding 25 Oil canisters to the fire, the burn time can be extended by 12 hours.