Neurothrope

Zoanthropes have a 3+ invulnerable save.

A unit with this special rule counts as a Mastery Level 1 Psyker. The unit follows all the
normal rules for Psykers, with the following clarifications:

The unit uses the Leadership of its character, if there is one (and he is alive), or the unit,
if there isn't a character (or he is dead), for Psychic tests. The unit can never use the
Leadership of an Independent Character for Psychic tests.

If the unit suffers the Perils of the Warp, or any other attack that specifically targets
Psykers, it is resolved against the character, if there is one (and he is alive), or against a
random, non-character model in the unit, if there is no character (or he is dead).

A Zoanthrope brood follows all the rules for Brotherhood of Psykers except that the unit
has a Mastery Level of 2. In addition, if a Zoanthrope Brood uses the Warp Blast power 
(see Codex: Tyranids) the number of shots fired is equal to the number of Zoanthropes 
and Neurothropes in that brood.

For example, a brood of three Zoanthropes that successfully manifested Warp Blast
would treat both the Burst and Lance profiles as Assault 3.

All enemy units and models with the Psyker, Psychic Pilot or Brotherhood of Psykers
special rules suffer a -3 penalty to their Leadership whilst they are within 12" of one or
more models with the Shadow in the Warp special rule.

Very Bulky models count as three models for the purposes of Transport Capacity.

Models with the Synapse Creature special rule have a synapse range of 12". Friendly
Codex: Tyranids models within this synapse range, including the Synapse Creatures
themselves, have the Fearless special rule. If a unit from Codex: Tyranids is falling back
and at least one of the unit's models is within a friendly Synapse Creature's synapse range
before the unit moves, the unit automatically Regroups.