Possible Clues:

• Aphrodite's mythical husband
• Longtime enemy of Wonder Woman
• 'Wonder Woman' villain
• Olympian battler
• "Iliad" god who favored the Trojans
• God whose name is a homophone of a zodiac sign
• God of war, in mythology
• Eros' father
• Ancient Greek warmonger
• His horses were Flame and Terror