[DISCLAMER: This isn't mine, I just remade it for 1.12.2. All credit goes to SCMowns!]
If you miss the John mod this remake is for you!
Adds 3 monsters:
+The John, A monster that's fast, deadly, immune to fire, and he spawns in the day! Drops immortal gems which can be made into a awesome sword!
+Baby John, A weaker variant of the John. Doesn't drop immortal gems but instead XP bottles!
+Mega John is a powerful and huge John with diamonds for loot! It's very hard to find [Only at night!]