Unidentified Egyptian spell

This unidentified Egyptian spell has been cast by Willow Rosenberg during the battle before the End of Magic and, presumably in a non-verbal form, in the battle against the demons and mystics guarding the entrance to the Deeper Well in England.

Incantation
NUK UA EM ENNU, EN NETERU MESU NUT.

SEMAAIU XEFT NU, AUSAR XENRA SEBAU.

Description
As Willow recites the incantation in flight while facing a massive demon, energy starts to gather in her hands. As she finishes the incantation, the energy already reaches its peak but its full effects are unknown as Willow lost her powers when Buffy broke the Seed of Wonder with the Scythe.

However, during the battle Willow participated in to gain access to the Deeper Well, she cast a similar spell that manifests as a blast of powerful magical energies that can decimate multiple demons and take down single larger demons, which is further strengthened when she allows her dark side to take over. Though the first spell and the second spell are very similar to each other, it is not clear whether these spells are the same or not.

Appearances

 * Last Gleaming, Part Four
 * The Core, Part Two (presumably)