Dark Magic double set for different looks into sorcery effects
My recommendation would be: use the green palette for necromancy spells/aura/evocations. The brightest green makes the eerie and forbidden atmosphere pop when well used. This palette is better suited for a necromancer or shaman.
The purple palette can also used be for dark magic, but I think it fits better with portals, seals, or energy projectiles like fireballs. It fits better for dark sorcerers/evil wizards.