Force Destruction

Force Destruction was a dark side ability of certain gifted Sith and Dark Jedi, allowing them to create a massive energy field and throw it in any direction. When used, a massive amount of energy was stored up within the user, and with incredible concentration, the energy could be discharged using the user's own body as a conduit. This destruction was visible in the form of a large fireball, usually fired through the arm or hand, and could blast a large radius vaporizing anyone who got too near it.

Using Force Destruction was a very exhausting power requiring a great deal of focus and concentration and could only be used a few times without requiring the user to rest. As it was such an advanced skill, it was generally only taught to more experienced Force-users such as Jedi Masters. Jerec was the most famous person to have used this ability, hurling fireballs as he dueled a young Kyle Katarn in the Valley of the Jedi. Boc was also known to have used this Force power.

A Similar power was used by Darth Bane, who used it several times in his rise to power as a Sith Lord. His most notable use was against the Twi'lek Blademaster Kas'im, the mentor who taught Bane Djem So. At the end of a duel at the Rakatan Temple on the Unknown World, Bane used this power to attempt to annihilate his former mentor. While his mentor shielded the blast, the energy of the wave tore apart the temple itself, crushing Kas'im.

Behind the scenes
Although Darth Vader appears to wield a power similar to Force Destruction in Splinter of the Mind's Eye, the ability is actually a "kinetite" or restrained energy orb -- not a Force power at all, but the product of a device built into his bionic suit.

Appearances

 * Darth Bane: Path of Destruction
 * Star Wars: Jedi Knight: Dark Forces II
 * ''Star Wars: Jedi Knight: Mysteries of the Sith
 * Splinter of the Mind's Eye