Mobzilla (based on Toho's Godzilla) is the strongest hostile mob in Minecraft, added in the 50.6 update. It only spawns in Ocean and Plains biomes and is not manually summoned, spawning in any level of light. Its arrival is always marked with a massive storm 10x more dangerous than typical ones. Also, for good measure, around 50 Iron Armor Zombies are accompanying him at all times, fending off any players and killing anything in sight. He stands at over 50 blocks high, towering over all other entities. Mobzilla is automatically hostile towards every single mob. Upon spawning, he actively begins to roam towards the nearest player or their creations. There is virtually no hope to defeat Mobzilla and his Zombie Army until the player(s) reaches their maximum power.
He is undoubtedly the final and hardest boss in Minecraft.
Damage Value: 10 Hearts per kick.
Armor: 40 (equivalent to two sets of diamond armor)
Kick/Punch - Standard melee attack, knocks target 2 blocks in the air.
Atomic Breath - Launches a barrage of dozens of Ghast and Blaze bombs.
Lightning - All players within the immediate vicinity of Mobzilla will periodically be hit with lightning bolts.
Seismic Attack - Tosses all nearby players 10 blocks into the air.
Lava Breath - Spews lava source blocks in all directions.
Roar - Gives all nearby players a Weakness and Slowness status effect for 20 seconds.
Nuclear Pulse - Sets all nearby players alight until in contact with water
Super Jump - Used to navigate freely across the map, over 25 blocks max height Burning Mobzilla - Upon losing 3/4 of its health, all of its abilities and attributes are increased by 25%
Only one Mobzilla can spawn in the world at a time (spawnings spaced out by at least 10 Minecraft days)
Incredibly advanced and superior Artificial Intelligence
No fire damage
No fall damage
Moves extremely fast in water
Sinks to the bottom of water masses unlike other mobs
Destroys terrain in its way
Destroys layers of player-made blocks when stepped on
Super Regenerative Powers (2 hearts per second)
Self destructs on death, killing everything around it (10 second warning marked by glowing, roaring, and explosion particles)
Becomes stronger when in contact with water or lightning Total hostile mob spawning increases by 25% whenever Mobzilla is active
Drops on Death
64 Mobzilla Hide - Used to craft strongest armor in the game
2-5 Mobzilla Claw - Used to craft strongest sword and bow in the game
128 Mobzilla Tooth - Substitutes as 5x more powerful arrows for bows (compatible with Infinity)
4-6 Mobzilla Dorsal Fin - can be combined with any armor piece to add Thorns V enchantment (does not accelerate breaking rate)
25% chance to drop Mobzilla Skull Trophy
A sizeable bounty of tons of blocks of Emerald, Diamond, Iron, Gold, Nether Stars, or even Dragon Eggs
Several various Enchanted Books
1 Space Mobzilla Spawn Egg
An even more powerful variant that does not count as another mob is Space Mobzilla, who is even more powerful and harder to kill. It has all the same stats and attributes as normal Mobzilla, only multiplied by 5. Upon death, Space Mobzilla drops twice the loot as his counterpart.