Dark Elixir Spell Factory

Dark Elixir Spell Factory is a new factory with spells that can only be created using Dark Elixir. The spells are mysterious and have very unique abilities, spells I've made like Beam Spell and Stone Flesh, and Necro Bombs. Rather than a pool of liquid like the regular spell factory, this one can be a cauldron over a hot flame boiling and bubbling. If Stone Flesh is too powerful with the healing spell and the rage spell, then there could simply be a rule that only allows you to have either the Dark Elixir Spell Factory on or the Regular Spell Factory on, whenever one is turned on you can use those spells and the other one automatically turns off, any already made spells will simply be stored until the corresponding factory for those spells is activated. It's kindof a cool way to create a class for yourself :)