Taking on the appearance of a simple stave with an ornate head, the sapphire crystalline headpiece of an Aeonstave contains a massive chronal charge that, when unleashed, can trap a foe in a bubble of slow-time for an extended period of time, severely degrading the enemy's physical capabilities and power to defend themself.
This is because each blow from an Aeonstave generates a low-level stasis field that encapsulates the foe and moves them outside the flow of the normal space-time continuum.
- Codex: Necrons (5th Edition), pg. 84
- Deathwatch: The Outer Reach (RPG), pg. 123