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You place a chicken spawn egg in an anvil and rename it whatever you want to call your chicken
By either going into creative mode and getting a Spawn Egg, or by activating "Cheats" in Survival mode and using the command "/give (Minecraft Name) (Number) (ID Number for Spawn Egg/Name of Spawn Egg)"
You name the spawn egg dinnerbone or grumm
There's no spawn egg for enderdragon.
In creative mode you can spawn a zombie with the egg
with a cow egg
There is no human spawn egg unless you have mods for it
Use a spawn egg in creative or look for a nether fotress where they spawn.
I have only gotton two kinds, the ones I got were 1. Black with Green eyes 2. The one that looked like garfeild. I don't know if there are any more, or I am only listing 2.
spawn it with an ocelot egg
They just naturally spawn in jungles. Unless you're in creative, where you can use an ocelot spawn egg to spawn one in.
Are u asking how to spawn witches? (well you go into creative and you look for a spawn egg and you will find a witch spawn egg) or are u asking how do they spawn? (Well they spawn at night) I hoped that helped! ~Magpie