The Narmquist Galaxy eventually collapsed into a Black Spiral, but it's central consciousness survived inside a MetaGravity particle, stuck within the Spiral. When a team of astronauts tried to extract the particle and take it into normalspace, it mutated into a large bean-shaped object, that grew larger the further the astronauts traveled away from the Spiral. Once the team returned to their own galaxy, the particle understood what sentience meant there, and evolved into a kaiju, hoping to give birth to its own galactic self again.
ABILITIES:
Sentience-Field: grows larger, the more it encounters sentience
Ginga-Tongue: extends for very long distance to attack enemies
Shatter: breaks into millions of tiny beans then reforms elsewhere