This simple datapack adds the capability for bells to reveal the locations of mobs the trial spawner they were placed on top of spawned. This only works if the bell is placed on top of the trial spawner, and won't work in any other position.
The relevant mobs will be given the glowing effect for 30 seconds so you can easily track them down if they wandered off. Mobs from other spawners will not be affected, but the glowing effect will not be removed from mobs that have it already and are from different spawners.
If you notice any bugs or have constructive feedback, please let me know.
