Bogged Spawn Egg is a Creative-mode item that spawns a single Bogged — a swamp skeleton variant covered in mushrooms — the moment a player uses it on a block surface. Bogged Spawn Egg was added in Minecraft 1.21, the Tricky Trials update, alongside the Bogged mob itself, and exists in both Java Edition and Bedrock Edition. Bogged Spawn Egg cannot be crafted, mined, or found in Survival mode; it is available only from the Creative inventory or the /give command (minecraft:bogged_spawn_egg). The egg uses the standard spawn-egg shape with a dark olive-green base and pale teal speckles that match the Bogged's mossy, fungus-grown look.

Players use Bogged Spawn Egg to test combat, build mob arenas, or stock adventure maps without waiting for a Bogged to spawn naturally in swamp and mangrove swamp biomes or from trial spawners in trial chambers. A Bogged created from the egg is hostile: it fires arrows that inflict Poison, has 16 health (8 hearts) instead of a normal skeleton's 20, and burns in daylight unless sheltered. When killed it drops bones and arrows, and shearing a live Bogged with shears yields a red mushroom while removing the mushrooms from its body. Map-makers rely on Bogged Spawn Egg to place this ranged threat exactly where an encounter needs it, and Bedrock players can load the egg into a dispenser to spawn Bogged automatically with redstone.