A spell which Jak Ohmsford learned from the shade of Stenmin in order to dispel the magical barrier around the Vault of Tyrsis and lift the plague of the undead.

It required a formula with the following:

That Which Feeds upon the Living
a parasite such as mistletoe
That Which Drives away the Dead
laurel leaves
That Which Died When First it Blossoemd
dried flower petals
Within One Good Gone Bad
in vinegar

It then required to say "Field of fire now be gone" thrice.