"A flashy feature that has limited usability for victory." * The Excalibur from Crusade had the ability to fire a supercharged shot that could kill any ship it faced. Downside? It almost drained the ship, leaving it vulnerable for a minute. A minute in which the destroyed enemy ship's buddies could use to wail on it. They only try to use it as a last resort. Besides, the ship has top-of-the-line armor which absorbs and dissipates something like 80% of incoming energy. * Deadliest Warrior had some. * Stargate SG-1: * The staff weapon. It looks great, it fires loud bright bolts of plasma, the wounds look horrific, it doubles as a melee weapon... but it's also really hard to aim, rarely do damage beyond twenty meters, fires only once a second, and the wounds are self-cauterizing