Ferozarium Core

The Ferozarium core is an boss that will appear once you destroy the moon lord, after moon lord dies a message appears saying "A powerful creature has descended from the sky" then the boss will appear somewhere in the world

The Fight
The fight consists of the body moving a lot and the hands following the player, the hands have 22 thousand health and the body 40 thousand

Drops
it drops:

Ferozarium 90 to 100 pieces 100% chance of drop

Core Punch 10% chance of drop

Great Pickaxe of the sky 5% of drop