[Bozos of Bones]

"An invisibility spell engulfing several people and lasting for hours is a difficult cast for any wizard. But an enchantment of only several minutes is a much more accomplishable task. If any of us spot an enemy I can cast the spell which will hold untill we can hide or the enemy leaves. The forest over there looks like a good place to hide." Therlion points to a dense forest on the side. "We could hide there for now, untill Turin examines the diary."