Black Moblins are enemies in Breath of the Wild.
Hyrule Compendium Entry
Black Moblins are tall, heavy monsters that can be found all over Hyrule. They are stronger, more resilient variants of Blue Moblins. They are usually armed with the strongest Moblin Weapons. When defeated, they drop Moblin Horns, Moblin Fangs, and Moblin Guts.