The X in the casting cost applies to damage and the number of creatures you target, giving you the flexibility to wipe a board however you want while leaving behind a powerful Enchantment
Since its a mono-colored deck, those Arena wildcards dont have to go towards lands, unless you're like me and splash blue with Steam Vents and Riverpyre Verge to play Scalding Viper
Rhys the Redeemed At just one mana, Rhys comes down on turn one and immediately starts working
There are also static abilities that can gain massive amounts of life without using more than a couple of mana
Which is okay, especially if you build around turning enchantments into creatures, one option would be to set up a bunch of fattie enchantments and keep casting Wrath of God and then animate them all at once
Theres additional trope space we can play in as well that the setting brings to the game, and we love designing cards to our settings. Endless Punishment highlights the potential for this trope space to open doors for more creative design that doesnt have to be a perfect fit for the overarching group slug deck