Java Edition:Permanent Vex

Warning: April Fools' 

This feature requires April Fools' versions and may require the use of file modifications to load. See the tutorial for information on loading these versions.

Vexes can usually only be found when summoned by evokers, but they are temporary and will vanish after a short amount of time. However, a few versions have allowed for vexes that never vanish, similar to the permanent wandering trader. Vexes will not vanish if spawned by a spawn egg, allowing them to be obtained they in newer versions.

Obtaining

This article is a work in progress. 

Please help in the creation of this article by expanding or improving it.
To do: Add a list of possible 20w14∞ dimensions and check if there are any other ways to obtain this mob.

22w13oneBlockAtATime Endermen Spawning

Endermen in the April Fools' version 22w13oneBlockAtATime spawn carrying random blocks. One of these blocks they can spawn with is vex spawn egg. There are 902 different blocks that are equally likely for them to spawn with and so there is a 1/902 = 0.11% chance of the enderman spawning with this block specifically. If the enderman spawns holding a generic_item_block (1/902) there's also a 1/1105 chance it will be this block as its block state, but there's only a 0.0001% chance of this occurring.^[1]

In the version, the block can be received from the enderman by angering it then letting it attack the player with an open hand. This will cause the block to transfer into the player's hand. Also, if the enderman dies and the falling block launches from the enderman, this can be picked up by the player. The items can be stored in 22w13oneBlockAtATime by switching the block from carrying to the offhand, shift right-clicking onto a donkey/mule with a chest, and then swapping the item into a slot. Additionally, the enderman carrying the block can be updated and then killed in a later version to obtain the item.

23w13a_or_b Votes

The April Fool's snapshot 23w13a_or_b introduces a plethora of ways to obtain every block and item in the game, including vex spawn egg. These include:

1. The egg_free vote, when applied, will allow chickens to lay any block or item in the game (without NBT). This means all chickens have the chance of laying vex spawn egg.
2. The give_item vote, when applied, will give every online player a random amount of any block or item in the game (without NBT), meaning that you could have vex spawn egg randomly given to you.
3. The fish_anything vote, when applied, will allow any item from the creative menu (not the operator tab, with NBT) to be fished (combine with the buff_fishing vote to greatly increase fishing speed). What this means is that there is a chance that vex spawn egg can be randomly fished.
4. The replace_items vote, when applied, will replace all items in online players' inventories with any block or item in the game (NBT of the original replaced item is preserved). This allows for vex spawn egg with any NBT.
5. The replace_loot_drop vote, when applied, will replace all loot drops of a random block or item with any block or item in the game (if the original item that is being dropped has NBT, it will be preserved). This is also another method for vex spawn egg with any NBT.
6. The replace_recipe_output vote, when applied, will replace all recipes for the given item with any block or item in the game (NBT is preserved if the original output item is supposed to have NBT.) This is yet another method for vex spawn egg with any NBT.
7. The villager_gem vote, when applied, will replace all emeralds in all loaded villager's trades with any block or item in the game (without NBT). This means that you can get a villager that trades vex spawn egg, allowing for infinite amounts of vex spawn egg.
8. The basalt_gen_replace, cobblestone_gen_replace, obsidian_gen_replace, and stone_gen_replace votes, when applied, replace the block of their respective fluid interaction with any block in the game, allowing for blocks in invalid positions and the placement of operator-only blocks such as the command block.