|Although this article is based on canonical information, the actual name of this subject is conjectural.|
- ―Rupert Giles[src]
The Energy Blast Spell is used to project a mass of concussive energy and blast it against a target. Like many spells, it had the appearance of a light bolt of energy.In May 2002, using the borrowed power of the Devon Coven, Rupert Giles used this spell in his magical duel against Willow Rosenberg after she became capable of countering his Binding Field Spell.
To destroy the Safe Zone force field, Willow cast the spell at the building housing its generators, freeing dozens of demons and vampires. She called it Hammer of Govannon, and used it at a strength enough to tap her out.