Because you get to choose the amount of Energy you pay, its really not difficult to make the Aetherkite decimate your opponents while leaving you relatively unscathed
With that, those are all the new Warhammer Secret Lair Magic cards weve seen
I think most often youre dropping it as the Parlor, and then when you want to close the game, you unlock the Secret Arcade, which will buff your All that Glitters, Ancestral Mask et al
Green-black has plenty of enchantments which provide self-mill, as well as generating value from the cards being milled
Dance of the Dead is weakest with its potential upkeep cost but being able to play a dork for two or less is a big deal when it is the right dork
I also plug Atlantis Attacks in here as a noncreature spell that can give you a big leviathan as well as bounce a couple permanents