Satae drifted lazily through space, contemplating the growing Universe. She had quietly abandoned the Council, melting into the shadows after the Chained One practically summoned the Abomination into their collective laps. The presence of that... thing, lashing out at him.... it was just too much to bear. Besides, her siblings had- apart from that incident- seemed to be handling things reasonably well, and it wasn't like she was obligated to finish what she had started. Fighting wasn't her schtick, and she had witnessed how well a head-on attack had gone over. No, she had... subtler plans.
For too long, she'd watched and waited, and pent-up cosmic power radiated from her body; shadowy tendrils writhing in the void.
It was time to get to work. The Lady of Darkness turned away from her sibling's creations, towards the veil of stars that lined the edge of the infinite expanse. This wasn't part of the plan, but it was an investment in the future, and served to burn off some excess energy; She gathered power into her hands, summoning forth a pile of sand. Each grain glittered brilliantly, visible from the farthest reaches of the Universe.
Satae called to several of her Fey, and bid them scatter the sand across the veil, sowing it like seeds upon a vast plain. These new stars were not as bright as the original ones, nor as powerful, and they did not form any meaningful constellations, but she wasn't finished. While the Fey worked, she reached forth, grasping the veil, and shifted it, gifting motion to the stars. Eventually, across the night skies of the worlds, the existing constellations would break apart, only to eventually form new signs with new powers. In this way, the power of change would help protect mortals over the eons. Xarn's Fist, however, being what it was, remained static- she couldn't influence the creation favored by the Over-God, and cared not to try.
Now to get to the business of the Abomination. But first, a bit of privacy was in order... It wouldn't do to have people spy on her devious schemes.
She slashed out at the fabric of Foundation with her trident, tearing open a rift- not the sort of rift as Xarn would create, which pierced through the very Essence of the Universe (she neither needed nor desired to expend that much effort), but merely a gap through which she formed a small pocket dimension- a little parcel off to the left of reality. This she enchanted and warded before sealing the gap: only guests invited could enter, unless she brought them there personally. Granted, she mused, some might breach it's defenses through sheer brute force, but first they would have to locate something which did not truly exist.
Meanwhile, hidden among countless rows of bookshelves in Dragnar's library, the interest of one Fey was piqued, and it silently shadowed a certain librarian carrying a certain tome. Satae smiled. Perhaps she would be checking out a book today...
Satae fills the night sky with additional stars (it felt a little empty), but no new constellations. Then, she sets the stars and constellations in motion; they'll eventually break up and reform as new signs with new powers (Xarn's Fist, for obvious reasons, is unaffected).
Satae also creates a small pocket dimension, and wards it against uninvited guests.