Scarab
From Lexicanum
Scarabs are a small unit used by the Necrons. They are a silver colour, tarnished by millennia like the rest of the Necron army. They fly ahead of the main army in swarms so thick that they've been known to blot out the sun. They appear out of nowhere, deadly, but making no sound except for the rustle of carapace over carapace.
A squad is made up of between 3 and 10 Scarabs with no weapons, but their claws are sufficiently sharp to slice through an enemy's armour. Because of their size they can find cover easily, but when in swarm they are vulnerable to massed ordnance. They may be armed with Disruption Fields for attacking heavily armoured targets.
A common Scarab tactic is to use them to stall stronger elements of the enemy army in close combat, such as Greater Daemons and Avatars.
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