Thundering Blade of Elemental Fury

I surround my blade with Thundering Fury.

Speak

Verbal: “I surround my blade with Thundering Fury”

This spell allows the caster to gain a +15 damage bonus for the next 15 swings of his or her weapon, and calls the Lightning tagline.

This spell only affects the very next swing made by the caster, and that swing must occur within 10 minutes of casting this spell.

Note: At character creation, this spell must be chosen before any other spell of it's level can be added to your book. In instances where multiple spells like this are available, only one needs to be chosen.