Copper Pig

In my opinion, pigs should get more attention, as they currently serve only as a food source—which feels unfair, since eating pork doesn't really offer any benefit other than satisfying hunger. With that in mind, a new "copper pig" mob would be interesting; besides having a unique look, they would be rare and spawn only underground. Killing a copper pig would usually yield 10 to 20 copper ingots, but there would be a 0.00000001% chance of it dropping a copper pig head a legendary-tier item.