Ferocious

+1 Strength and +1 Initiative. Fericious troops must assault if there are any targets in range and must perform a sweeping advance. When a brood is subject to Ferocity the normal Deep Strike rule that models are destroyed if they land within 1" of an enemy model does not apply. Instead, any enemy models that are also under, or partially under, the large template mayy be attack in close combat. This is done in the Assault phase and is conducted normally with the Tryanids counting as charging.
But, at the end of each Assault phase of the Tyranid player's turn, whether the unit has been in close combat or not, resolve a Strength 2 hit on each Ferocious brood member on the table, with no Armour save.