The Lord of the Fruit Flies is an aggressive boss monster that is exclusive to Don't Starve Together and introduced in Reap What You Sow. It appears when there are 15 or more fully grown Farm Plants within a radius of 1.5 tiles, and only when the player is present when the 15th plant grow to 4th stage. Initially, it can only appear after 35 days. Each time a farm plant rots, the timer is advanced by half a day.
The Lord of the Fruit Flies spawns up to 4 Fruit Flies. It has only one melee attack and it will try to kite the player. It does not follow the player further than 7.5 tiles from its spawning point. Nearby Fruit Flies become aggressive towards the player when the Lord of the Fruit Flies is killed.
Upon death, it drops 1 Leafy Meat, 4 random Plant Seeds plus up to 4 extra plant seeds with a 25% chance each. The seeds chance depends on the season. It also drops 1 Friendly Fruit Fly Fruit if there is no other Friendly Fruit Fly Fruit in the world. It can reappear after 20 days; the timer is advanced by half a day each time a farm plant rots. The Lord of the Fruit Flies will not spawn while another exists in the world.
The Fruit Fly is spawned by the Lord of the Fruit Flies. It also has a 5% chance to spawn when a player picks a non-giant rotten Farm Plant. Harvesting a rotten Giant farm plant spawns 2 Fruit Flies.
They have a weak melee attack but they do not defend themselves if attacked. If the Lord of the Fruit Flies is killed, they are able to become aggressive toward the player. They will also become aggressive if they have planted a weed or have made a Farm Plant upset. They have a 10% chance to drop one Seeds when killed.
- Its name may be a reference to the demon Beelzebub, whose name translated from Hebrew means "Lord of the Flies".
- Its name may also be a reference to William Golding's famous 1954 novel, Lord of the Flies, in which a group of British schoolboys are stranded on an island following a plane crash.