The final Miniboss! The fire guardian has THREE attacks instead of the usual two,

Summon him by killing 20 blazes, 15 ghasts, or 5 wither skeletons

His attacks are:
- Firestorm: The whole area around him is coated in fire

- Flame burst: Flame sparks fly around, withering you
- Magma Launch: He summons a large magma cube to do his bidding.

I wonder.. maybe when all of the guardians get too close to each other, maybe they'll Overload...