Hellenic god advising the hight priest on adjudments to the Aztec calendar.

This scene draws from elements of Mexican lands to depict the impossible intersection of two worlds and two eras.
A Greek god has traveled through time and landed in a new dimension to offer astronomical advice to a Mexican boy—who is, in fact, the most important Aztec priest of all time.
The boy is adjusting the Aztec calendar, correcting subtle imperfections that go unnoticed by most astronomers—but not by the great priest.