Sautekh

All Necron units change their [Dynasty] keyword to Sautekh. All units with the Sautekh Keyword gain the Allegiance: Sautekh special rule. The Allegiance: Sautekh special rule consists of the following rules:

• Terror of the Storm: Sautekh units gain the Fear (1) special rule and may re-roll Living Metal rolls of 1.
• The Storm Lord's Host: If Imotekh the Stormlord is in your army, he must be your Warlord. In addition, Sautekh units in your army with the Character special rule must declare a charge if there are any enemy units within charge range at the start of the Charge Phase.