Bhagavad Gita, Chapter 10, Verse 19

The Deity said: I shall speak to you now, O best of the Kurus, of My divine attributes, according to their prominence; there is no end to the particulars of My manifestation.

Even a real, thorough answer here is offered as only a fraction, since the actual list has no end.

Krishna is honest upfront about the limits of what follows, this is described as a sample, not a complete account. What comes next should be read with that real scale in mind.