Let’s come up Dark Elements for Magical Girls(using various Fictions as inspiration)! I’ll start:
Darkness: The Purplish Stuff that we usually see on Video Games and Anime.
Souls: Should be like the Blueish Black stuff seen in Drustvar and Guild Wars 2 though with more screaming ghosts coming out of the Magical Girl’s attacks.
Death: Almost Identical to the Jade Green stuff seen in GW and the most recent patch of WoW but should have Skulls associated with the Magical Girl’s attacks.
Light: Visually the same as Yellow-Black Corruption from Darksiders 2. Sometimes resembles the Light Attacks in Kingdom Hearts(only the ones with Black Cores) but more Yellow than Golden.
Nightmare: Reddish-Black stuff.
Glitch: Cyan and Jade Greenish Glitchy Energy.
Fury: Pinkish-Red Energy
War: Glowing Reddish Orange Blades coming out of the ground.
Gluttony: Glowing Spring Green Goop.
Envy: Yellow-Green Ripoffs of other Attacks.
Wrath: Whitish Fire
Disease: Rotting Goop
Blood: Obviously Blood.
Any other Dark Elements that I missed that may look interesting for a Magical Girl Anime?