Sheer Heart Attack is a Sub-Stand takes the form of a plated sphere with a superficial, removable knob on its top and tank treads on either side. Embedded at its front is a cat-skull similar to those on Killer Queen's body, and on its forehead is a downward dagger that may represent an assassin. It's ability is to track someone or something in heat or warm in its environment. Making it its target. It will explode once it closes contact with its target. It can only speak "Look over here!".