The horror

The terrifying psychic presence of the Hive Mind
radiates from the synapse creature, flooding the minds
of the Tyranids’ enemies and causing them to quail
and panic.
The Horror has a warp charge value of 6. If
manifested, select a unit within 24" that is visible
to the psyker. Until the start of your next
Psychic phase, that unit must subtract 1 from
their hit rolls and Leadership characteristic.