Kill

Kill is one of the strongest attack spells available. Casting this spell, a bolt of lethal energy is fired at the foe. In almost all cases this one bolt is deadly, resulting in an instant kill. This is the reason why most mages strive to learn this attack spell as fast as possible. No armour, and no magical protection helps against it, although some monsters have a natural protection against death energies.

The spell is also known as Death Bolt and Mind Blast.

Ultima Saga
After touching the temporal curtain created by Balthan at the end of The Forge of Virtue, Jordan is blinded by magic. The spell scrolls used to construct the time wall are An Tym, Xen Corp and Vas Lor. Balthan had been illuminating scrolls of Eighth Circle magic when Blackthorn took his master Felespar, including those that could "slay a man wherever he stood".

Quote

 * The magician sank slowly to his knees. "I used three scrolls: An Tym, to slow time; Xen Corp, to kill; and Vas Lor, great light to bind them otgether and because it was the only scroll I had left. I don't know what happened to the Xen Corp--" The gleaming wood fell from Balthan's fingers, "--but it's the other two that are blinding you."

- from The Forge of Virtue (Ultima Saga)

Trivia

 * Dragons are immune to this spell.
 * Liches, post-Ultima IV, tend to use this spell for an instant kill against the Avatar, making them very dangerous.
 * Kill works on undead creatures, even though the description in Ultima IV implies it does not.