Magic Egg

The throwable egg converts entities into their spawn eggs. A thrown Magic Egg reaches the first entity it hits and changes that mob into a spawn egg, which drops and stacks up to 16. Throwing the egg at a block instead of a mob resolves the throw as a miss. A converted spawn egg holds the captured mob's data, so placing it brings back that mob with its variant, custom name, saddle, tamed-by owner and health, along with carried inventory.

The Ender Egg is a second throwable that works the same way, except that it keeps the animal rather than its kind. A dropped egg is named after the mob it holds, and a shulker box holding such eggs can be read at a glance. The mod requires Fabric API and runs on the server alone. It is open source under the MIT License and is published for 1.21.11 and 26.3.

The recipe is a particular arrangement of four lapis lazuli, four ender pearls and an egg, and it is not shown in the usual recipe book. With village-quests installed, a cleric describes the pieces and asks the player to bring them in exchange for a full set of materials for one egg, and the second half of the recipe only appears once the player has been taught the first half.