The 1.21 update for introduced a new status condition that, if used in combination with passive Allay mobs, can create a nearly infinite source of XP. No complex contraptions or massive farms are needed to exploit a rare interaction that yields a replenishing source of experience. Those looking to afford every enchantment they could want should consider using Infested Allays for their next project.
Before you begin, try to find Allay mobs by traveling to Pillager Outposts or Woodland Mansions within some of the best seeds for . Befriend these small, ghostly creatures and duplicate them by giving them amethyst shards while playing music from a Music Box. Once you have enough of these mobs running around, you can create a farm that generates free XP for your character.
You can give an Allay an item to have the creature go out into the world and return with more instances of that same material when it is loyal to your character.
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This XP farm in works by using a Potion of Infestation on an Allay and making the mob constantly take damage. Those afflicted with the status condition have a chance to spawn silverfish mobs whenever they are hurt, which can then be killed for small amounts of XP. By setting up a trap that hurts an Allay over and over, you can consistently trigger silverfish to spawn as free sources of experience.
To understand this farm better, you have to understand Allay mobs and how they interact with the sandbox. Allays are hurt by being underwater, or from typical sources of danger, such as suffocating in Sand or Gravel blocks. While most mobs in these situations would die after a short time, Allays regenerate their health extremely quickly, allowing them to survive the slow damage built up by these circumstances.
If you are not sure how this farm works, check out the video below by YouTube creator SimplySarc, who
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