The Earth Trembles

Pick a friendly Seraphon Wizard to cast this spell, pick a point on the battlefield within 18" of them to be the target point, then make a casting roll of 2D6.

Draw a straight line between the target point and the closest part on the caster’s base. Roll a D3 for each unit (friendly and enemy) that has models passed across by this line. On a 2+, inflict an amount of mortal damage on that unit equal to the roll.