Devolve

Infuse with Bestial Vigour:
At the start of the movement phase add 3" to all
BRAYHERD units wholly within 12" of GBS
Devolve: Range 18" and not within 3" of friendly
Your opponent must move that model 2D6" so
that each model in the unit ends its move as close
as possible to a model from the friendly unit that
it was closest to at the start of the move.