The Solar System

Each of the answers to a puzzle in this round describes the domain of some Ancient Greek god or goddess (the gender is indicated by the male or female symbol next to the puzzle's name). Specifically, the puzzles, domains, and gods are:

Hermes: GOSSIP PHEME
Aphrodite: DISCORD ERIS
Gaia: WINE DIONYSUS
Ares: TRAGEDY MELPOMENE
Zeus: DREAMS MORPHEUS
Cronus: HARVEST DEMETER
Ouranos: DANCE TERPSICHORE
Poseidon: CHILDBIRTH EILEITHYIA

Reading the diagonal of the deities spells out PROPHECY, which is the domain of the god APOLLO, who is the answer.