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.
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