The Hive Mind

Description
The Hive Mind is a boss that should be fought once both the Wither and Ender Dragon have been defeated.

Info
The Hive Mind Resembles a fleshy hive, that slowly homes in on the player, it has 500 Hp, and direct contact deals 6 Hp of damage (1.5 hearts) On a player with full Protection III diamond gear, contact without any armor can kill you within 2 hits, (only 1 hit on criticals.) The Hive Mind randomly spawns in leeches, Leeches have 15 hp and deal 2hp of damage on full Protection III Diamond Gear.

Drops
Upon defeat, The Hive Mind drops 10 Hardened Diamond Ore, upon which also replaces 10% of your worlds Diamond Ore with Hardened Diamond Ore. Along with this, The Hive Mind also drops 2 Life Fragments, Each one increases your maximum HP by 0.5 Hearts.

Strategies
Build a Large Platform in the sky and summon The Hive Mind on it. Then, whenever it summons leeches, since the Leeches go do through blocks they have a chance to go under the platform, disabling the Leeches ability to attack you. However, the Leeches may not always do this, so still be careful.