Addon: Magma Giant Boss

Magma Giant Hand:

Drops when magma giant is defeated it does 50 damage:

Magma Heart:

This is a craftable item which is used to summon the magma giant its crafted with 8 magma block and 1 redstons block like this: to use it right click

Magma Giant:

It has 100 heats and deals a lot of damage and have some cool drops 

Magma Giant Head:

Dropped from magma giant it gives full armour protection

You can repair them using magma blocks both hand and head can be repaired