(This is my take on what the official MUTO will look like; my old take will just be simple parasites inside Vishnu)
Height: 70 meters
Mass: 20,000 tons
MUTO (Massive Unidentified Terrestrial Organism) is a deadly parasitic Kaiju that feeds on nuclear radiation. This is also, by far, one of the few known Kaiju that shows sexual dimorphism: The male has wings sprouting from his side, while the even larger female has an extra pair of front limbs. With sharp claws, powerful EMP bursts and a bad attitude, the frail-looking MUTO is very dangerous, even for Godzilla.
-Capable of speeds bursts of up to 100 mph.
-Razor sharp talons
-Converts absorbed radiation into a powerful EMP burst launched from claws
-Powerful echolocation to call/detect other MUTOs or sources of radiation