Lash of Slaanesh

Pick 1 point on the battlefield within 12" of
the caster that is visible to them, and draw an
imaginary straight line 1mm wide between
that point and the closest part of the caster's
base. Roll a dice for each enemy model
passed across by this line. On a 4+ that
model's unit suffers 1 mortal wound.
SLAANESH units are unaffected by this
spell.