Globber

Globbers are slime covered zombies that will spawn rarely in the Overworld. They will wear a slime block on their head, and both a leather chestplate and leather leggings, as well as holding slime balls in both the main hand and the offhand.

They will drop a piece of Expensive Leather, used to create the Breaking of the Wallet, as their armour and slime balls. Keep in mind that these items have a low drop chance, and as with every additional mob, consider killing them with the Looting enchantment.