Imaskarran Tome of Resonance

The Imaskarran Tome of Ice was a heavy and tattered tome with a single rune on the cover, translating simply to "Ice". The Imaskarran Tome of Ice detailed the process of creating an amulet of natural armor from the silk gland of an ettercap and a fenberry, using the spell lightning bolt.

Eltoora Sarptyl sought, maybe with the help of the Hero of Neverwinter, this tome around Port Llast. Though allegedly of Imaskarran origin, they were readable to the Hero of Neverwinter. It was in the possession of the witch Setara, within the Neverwinter Wood.

Excerpt
"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."