Kronos

All Tyranid units change their [Hive Fleet] keyword to Kronos. All units with the Kronos Keyword gain the Allegiance: Kronos special rule. The Allegiance: Kronos special rule consists of the following rules:

• The Deepest Shadow: Kronos units gain the Adamantium Will and Indomitable Spirit (4+) special rules.
• The Shadow Hunt: Kronos units must attempt to charge any units with the Psyker (x) rule or units with models with the Psyker (x) rule in them if they are eligible to charge in the charge Phase unless another unit is closer.