Based on the synthesis of information from Second Level and Third Level civilizations by scientists, they were also able to roughly infer some characteristics of Cosmic Civilizations beyond the Third Level.
In broad terms, First through Third Level Cosmic Civilizations can be considered as initial Cosmic Civilizations, characterized by their dependence on a Star System for existence, obtaining energy from the Star System's matter or the stars themselves, unable to access energy beyond their Star Systems.
At the same time, First through Third Level Cosmic Civilizations are incapable of achieving superluminal travel, not even near-light-speed flight methods.
Even the Aibo civilization had acquired the means of curvature travel as a "gift,"
Civilizations like humanity that can achieve near-light-speed at the First Level, and surpass light-speed through the Dark Matter World, are probably unique in the universe unless there are other Transcendents like Lu Yuanming.