Mutant Zombie Pigman
Think the mutant zombie is tough? Meet the mutant zombie pigman! He may look like a more ugly mutant zombie, but he holds a very big and heavy gold sword with both hands! If angered, he will swing it around and strike his target, hitting all other mobs in it's path, doing up to 7 hearts! And be careful, because if very angry, he may do the smash attack!! He jumps up into the air and lands on you, giving his biggest strike yet! This will do up to 12 hearts damage! But If he is hit by multiple explosions or hulk hammer attacks, he might drop his sword, and it will break in the explosion, dropping it! If this happens, he will roar, summoning automatically angry zombie pigmen, and in the time you are desperately fending off the zombie pigmen, he will have got out a spare gold sword! He can only do this twice though, so when he runs out of spare swords, he will take 2 of the regular zombie pigman's swords and attack with those! He can also take a few small sword and do the throw attack! He will throw all 5 of the swords at you, doing 2.5 hearts damage! If you have killed this monster, good job, but you might get covered in pig skin so you can't see! When he dies, he will fall forwards and shed his skin, leaving lots of pork on the ground! He will also spawn a few more zombie pigmen that aren't angry. He will also drop a massive gold sword you can attack with! But if he was using little swords, he will drop a few of them.
Spoiler:Mutant Wither Skeleton
The normal spider is annoying, but not very powerful at all. Don't think the mutant spider isn't a challenge! Find one, and without a sword you will end up in a very sticky situation! He can spawn lots of webs around him, also spawning both types of spiders in the web. He only has 45 hearts, but his regular attack does 3-4 hearts and gives you poison and slowness! Also look out for the stick attack! The mutant spider will jump into the air and stick to the cieling upside down if there is one, the wall sideways if there isn't a cieling, or will land on you, closing around your head, suffocating you! To stop him from doing this you must right click around you with flint and steel to set him on fire! This attack will also give you poison II, slowness, and weakness II. When he dies, his body will collapse into itself, making an explosion of lots of negative potion effects! This will also set a bit of the land on fire. Well then, wheres the reward? He will drop a new type of explosive and a spider launcher! The bomb will be a negative potion effect bomb, doing what the mutant spider death does, and the spider launcher will be a crossbow that fires tamed spiders and cave spiders that attack hostile mobs! Have fun with these!
The wither skeleton is a challenge, but mutate him and you are in for an unpleasant surprise! The mutant skeleton may be a skilled archer with cool ninja like moves, but the mutant wither skeleton is a ninja! He holds swords in both hands, and does lots of ninja moves with them! They give you the wither effect to any mob in their path. If the mutant wither skeleton disappears, check the air for the skull attack! He jumps into the air and puts his 2 swords together in a cross shape, firing heltiple with skulls out of the middle of the cross! And to do this for longer (maximum 3 seconds) he will grab onto the walls around him to keep himself in the air! And he doesn't take fall damage! Think you can kill this monster from range? If he has to hit something far away, he will put his swords away and get out a withered bow and fire arrows on fire and with the wither effect! Also, his final attack: The boomerang attack! He will amazingly take off his head; that's right, and throw it at you like a boomerang, so it goes round in a circle, hurting all mobs it goes through giving the wither II effect, then coming back to the mutant wither skeleton! If it hits a block, it will explode, giving any entity the wither III effect. If it explodes, he will die, but he hardly ever does this attack anyway. When he dies, he falls apart, and his bones can form and turn into wither skeletons if you don't pick them up after 5 minutes. When you pick the bones up, you can craft a new item with it: The wither skull and the wither skull shooter! The wither skulls can be shot out of the wither skull shooter. The wither skulls can also be placed down as the wither skeleton skull block. Good luck killing him!