Close Combat Weapons
Warscythes are made from the same living metal as the hulls of Necron ships and the C'tan necrodermis (see page 27). They have phase blades that slip effortlessly through the most powerful armour. A well-directed Warscythe can cut the barrel from a Leman Russ or carve a hole in the side of a bunker. There are no saving throws of any sort (including invulnerable saves) allowed against Warscythes, and when attacking vehicles 2D6 + Strength is rolled for armour penetration.
Errata — Chapter Approved: Codex: Necrons Q&A (v2.0): When a Necron Lord upgrades to a Warscythe, the Staff of Light is completely replaced — he loses its shooting attack as well, not just its melee profile.