Power Blades are a form of Eldar Power Weapons currently only available to Warp Spiders Exarchs, ordinarily being mounted on the forearm or retrofitted to the vambrace of the Warp Spider's armour rather than being hand-held. The term "Power Blade" also applies to the small dagger-like Power Weapons used by many Imperial military forces. They are easily concealable and often used on infiltration missions by assassins and stealth operatives. Power Blades rely on the strength of their built-in power field to maintain the integrity of the thin blade upon a strike.
- Black Crusade: Core Rulebook (RPG), pg. 163
- Codex: Eldar (6th Edition), pg. 65
- Codex: Eldar (4th Edition), pp. 36, 65
- Codex: Eldar (3rd Edition), pg. 9
- Codex: Eldar (2nd Edition), pp. 23, 38