When the descending torrent of wind vanished, the gleam of while bones was revealed, dark cracks peeping through their smooth surfaces. The set of bones looked like a densely packed rib cage, and from the pieces of rubble around their base, it could be seen that they'd erupted from the ground. As the bones withdrew, their contents being revealed much like the bud of a flower as it's petals bloomed, Felicia and Astird remained, the former rather irked by the destruction of her newly conquered castle. Noticeably, the girl was no longer a petite and waifish little thing with tender cheeks and a demure appearance. Instead, she seemed mature, almost buxom, as she stood clad in black dress that writhed just as much as the her aura.
An ominous atmosphere settled above the town, and slowly but surely, the Undead mistress began to strangle the life from the land, using it to fuel her own power. Grasses began to wither beneath the snow, their lush green leaves paling to a sickly yellow, Trees begun to creak and ground as their trunks fractured, brittle wood no longer strong enough to bear the weight of a canopy of branches and dead leaves. Creatures living beneath the snow fled in all directions, their consiences and souls making it too difficult for the necromancer to quickly siphon their lifeforce.
With each second that passed by the earth around them seem to exhale out one more breath of vitality, lost forever as it was absorbed by the Eldritch Litch. Luckily, the village was rather small, as Felicia was only able to absorb the essense from the creatures within 100m of her. Of course, that included the Air Spirit before her. She was a natural bane to creatures such as him, creatures that thrived off nature and its prosperity, for she was the anti-thesis of fertility. Her aura polluted the world if left unchecked, producing all manner of disease, plague or blight. That was simply the curse of the undead -or rather- those who embraced their undeath.
Her pollution trickled from her body, creeping across the still-remaining tiles of the castle. She was an emissiary of the netherworld, sent forth to claim that which she would. She'd intended to slowly corrupt the land after she'd weakened the kindgom, but the circumstances were against her. She would first cast the land into blight then conquer the surrounding villages with all due haste. She'd use those surrounding villages to create an information lock-down, and with enough luck, no one particularly troublesome would be alerted.
Though...that all hung on the fact that she could evict this air spirit from these lands. "Let's get started...shall we?"
Striking her hand out through the air she pointed her finger at the air spirit. The aura of death grew around her as she moved, her figure withering until she was naught but skin and bones, eyes sunken in and skin a pale sickly hue. She was a gaunt and ghastly apparation of unholy origins, the true physical form of an Eldrich Lich. "Undead Court!"
As her spell was cast, the aura of death around her intensified, spreading until it had settled around the stone castle. It was a magical field that would slowly but surely devour the life force of all those within it -with that in mind, the Necormancer swept out with her arm, the Skeletal apparation behind her rushing over to Astird, intent on removing the elf from the range of the field's effect.
While supremely powerful, Lich and undead in general had rather crippling weaknesses to Holy, Light, Celestial or other magics of that variety. Those magic would quickly undo the effects of their curses and suppress the deathly auras. The same was true for Holy equipment, or equipment enchanted specifically to deal with undead, using Mithril or other such holy metals.