Lictors

See the secret deployment rule in Codex: Tyranids

A Lictor always recieves a 5+ cover save, even in the open. If actually in cover, the cover save granted by the terrain is improved by 2.

At the end of any Assault phase, after all Morale checks have been taken, the Lictor can choose to immediately fall back 3D6" and regroup at the end of the move. Enemy models may not pursue the Lictor, but may consolidate.

Lictors cannot capture table quarters, hold objectives, or count as surviving troups in a Meat Grinder battle.

Creatures with scything talons count as having two close combat weapons in an assault and so gain +1 attack. Creatures with two sets of scything talons gain +2 Attacks. Ranged weapons that base their number of shots on the owner's Attacks do not gain additional shots.

Tyranids with rending claws inflict a wound automatically and ignore armour saves on to-hit rolls of 6. Other successful hits must roll ot wound as normal. If the creature rolls a 6 for Armour Penetration they then can roll an additional dice to determine the total Armour Penetration value.

Creates with flesh hooks count as being equipped with frag grenades. In addition, creatures with flesh hooks count "vertically impassable" pieces like high walls or cliffs as difficult terrain instead.

Automatically passes any Morale checks

The opposing player's line of fire is only blocked by terrain, vehicles and models in close combat while shooting at Tyranid models.