Bless Weapons

The priest imbues the weapons of those nearby with
the pure essence of the storm.
In your hero phase, pick a friendly unit wholly
within 18" of this PRIEST and roll a dice. On a
roll of 4+ the prayer is successful. If the prayer is
successful, until your next hero phase, each unmodified hit roll of 6 for an attack made by
that unit inflicts 1 extra hit on the target (usually
this will be 2 hits instead of 1). Make a wound
and save roll for each hit.