This heavy and tattered tome is labeled with a large and ancient rune that translates simply to 'Resonance'. Among its more interesting passages is the following:
"The Ettercap Silk Gland is a substance known to augment and accentuate the capabilities of other reagents, and is therefore quite popular amongst the scholars of wizardry. When combined with a Fen Berry and the spell Lightning Bolt, a magical mass is created that shimmers and glows while maintaining the electric charge of the spell. Those who have experimental with the mass find that the creation shows a resistance to many ranged effects. It can only be guessed that the nature-bound regenerative focus of the Fen Berry discharges Faerun's often-magical effects, while the Silk maintains the power of the Lightning Bolt.