Nether (Triggered by entering the Nether) – Mobs occasionally get potion buffs and iron tools. Zombies may apply potion effects when attacking.
Eye of Ender crafting (Triggered by crafting an Eye of Ender) – Mobs can now rarely have diamond tools, commonly use iron, and have increased potion buffs. Some may spawn with Totems of Undying in their offhand.
