Spawn Eggs - epolixa/Shroomhearth-Datapack GitHub Wiki
Mob Spawners drop a respective Spawn Egg when broken.
Obtainable Spawn Eggs include Zombie, Skeleton, Spider, Cave Spider, Blaze, and Magma Cube. These Spawn Eggs will also sometimes appear with the Wandering Trader as a feature of the Shroomhearth Mod.
Picking up a Spawn Egg grants the Advancement "Egg Harvest".
Note: As in Vanilla, Spawn Eggs can be used to "seed" a Mob Spawner. This makes it possible for a Player to create a Blaze spawner in the Overworld, for instance.