The Furnace is the miniboss of the Engine Room in Raider Zero.
It sits in the air,moving from left to right constantly.With its vertical tube,it launches grenades.After it drops 3 grenades,it will reach the soil and you can slash or shoot it.At low life(100 or less) it will launch two-three grenades at once and more often,when it is down,it will launch fire similar to the flamethrowers inside the level.After defeated,it gives you a power boost.
Very hard defense
Does not take damage from grenades.
deals 30-50 at contact