An infinite villager farm in Minecraft 1.21 is a type of farm that produces an infinite number of villagers. This can be useful for a variety of purposes, such as breeding villagers for trading, or creating a large population of villagers for a village.
There are two common designs for infinite villager farms in Minecraft 1.21. The first design uses a minecart with a villager inside, which is then pushed around by a piston. The second design uses a spawner, which spawns villagers at a regular interval.