About the Lava Monster Boss
The Lava Monster Boss drops 16 Tier 3 Sky eggs and also has a 0.01% (1/10000) chance of dropping a Lava Monster Boss Egg which has a 100% chance to hatch into a Lava Monster Boss pet which deals 2T damage.
Alatar is the person who will give you the quest which after completing will allow you to fight the Lava Monster Boss. Alatar also provides quests to get to every boss in the game.
Collect 39.3M Cyan Droplets
Defeat 50 Crazy unicorns