Crystal box/Crystal trap item

The crystal box can be used to trap, transport and release mobs. It can be crafted by surrounding an ender chest with amethyst shards and an nether star on top.

The crystal box will trap a mob inside of it when it walks on top of it and is powered by a amethyst shard (similiar to how you power a beacon with ore). Once a mob is trapped inside you can mine the box and take it back home and release it over the UI of the crystal box. Alternatively you can release it when powered with redstone. After releasing the mob it becomes passive for a short time, giving the player enough time to mine their crystal box.

In creative it can be used to spawn the caught mob multiple times, enabling easier map building for players who might not be very experienced with commands. It will not work on the wither, ender dragon and the warden

Optional features: -mob caught becomes permanently passive after releasing it -mob can be named when in box - box needs a specific lure for every mob - box needs to be refilled with a nether star after a specific amount of uses (maybe 50) - ender eye as fuel source instead of amethyst shards

Why do I want this as a feature: It can help getting mobs for farms and builds. Especially rarer ones from far away like the brown panda or mooshrooms. It also gives the player another reason to fight the wither.