Tomb Blade
Tomb Blades are the Necrons' obligatory jetbike unit. They were invented during the War in Heaven as spacecraft -- as the Necrons no longer breathed, they had no need for space suits or enclosed cockpits. They turned out to be extremely effective in atmosphere as well, and so they also became part of the Necrons' ground forces.
They are flown by Warriors, but because Warriors are terrible pilots on their own (being incapable of independent thought), the Warriors are themselves governed by "a series of hyper-fractal equations" that constrain the Tomb Blades to preplanned attack patterns. Why the Necrons bothered with the Warriors is a mystery for the ages (the book Hammer & Anvil implies its for the Warrior's auto-repair abilities).
Since deploying starship-grade weapons on the same continent as other Necron forces would be dangerous and self-destructive, ground-bound Tomb Blades are fitted with infantry weapons -- most commonly, a twin-linked set of gauss blasters or tesla carbines, although it can also use a Particle Beamer.