The "Pantheon's Power" deck is based around the constellation mechanic, an ability on enchantments that gives you a benefit every time an enchantment enters the battlefield under your control. Build up an array of constellation cards and watch their power amplify.
The more enchantments with constellation you control, the better each new enchantment becomes. If you control an Underworld Coinsmith when Grim Guardian enters the battlefield, your opponent will lose 1 life and you'll gain 1 life. While you control those, every enchantment you add to the battlefield will drain your opponent for 1 life in addition to its other effects. Add a Thoughtrender Lamia, and now your opponent must discard a card along with everything else.
Because of the powerful synergy inherent in your enchantments, you'll want to stall the game out to amass more and more constellation creatures with which to overwhelm your opponent. Oppressive Rays, Cast into Darkness, and Banishing Light are all great ways to slow down your opponent's assault as well as trigger your constellation abilities. Nyx Infusion and Armament of Nyx can be used offensively or defensively, depending on which better serves your nefarious plans.
Font of Return can be devastating against an opponent who kills lots of your creatures.
Other black and white enchantments would be right at home in this deck. You might want to try out Athreos, God of Passage. You gain plenty of devotion from all of your enchantments on the battlefield, and Athreos lets you get back your enchantment creatures that die over the course of the game and recast them to trigger constellation over and over.