Holtz are found in the lower regions of Norfair, and when undisturbed, will quietly hover in midair like armored floating sentries. When intruders get too close, Holtz will repeatedly swoop towards their target, making use of their combusted bio-propellants to generate thrust and quickly rise back into the air. Their short flipper-like appendages are moved to help stabilize their flight orientation, but they also serve as a pair of horns when aggressively ramming into targets. Since they are well-protected from their surroundings, Holtz will even dive into the most lethal forms of lava in order to attack.