Energy release is accomplished four ways. The first way is by flying/swimming. The second way is by shooting fire from the mouths. The top mouth lights fires that speed up time in their proximity. The bottom mouth lights fires that slow down time in their proximity. Cape dragons are immune to these effects (and to the heat). The third way is by "singing." Each tooth is a different size and vibrates at a different frequency, producing tones. The dragons can also hear with their teeth. The fourth way is by radiation. The eye-like spot near the base of the head (there is only one; there is not another on the back side) is not an eye, but a matter lamp. The matter lamp projects radiation through a narrow beam that collects onto any surface in its path. One hour at full intensity is enough for a one-inch pile to accumulate. Cape dragons will sometimes sit idly for days, drawing mazes and intricate designs by depositing ridges with their matter lamps.
The true eyes of these creatures are the tiny spots (there are two, one on this side and one on the other) at the tip of the upper jaw. They have somewhat poor vision and can only see within a narrow range of ultraviolet. On Earth's surface where most ultraviolet from the sun is blocked by the ozone layer, these creatures can just barely see at all.
These creatures do not breathe but require air/water for flying/swimming and for verbal communication by singing. They are very nearly weightless and ninety percent of their weight is in the scales. The weight is attached to the scales in an unusual way. When a scale falls off and hits the ground hard enough, the massive part of it detaches and continues to fall through the planet (it is made of a material that interacts only weakly with normal (baryonic) matter) while the visible, tangible part of the scale rebounds and is nearly weightless. The scales protect the dragons, making them virtually indestructable. Supernovas can still kill them.