i was thinking of a spell that is more like a body spirit link..
when the targeted unit gets damage.. the caster also gets an equal damage..
when the casted unit dies.. or heals.. the caster also will.. =) unless the casted unit gets away the range of the caster.. the link would be cutted. =)
i was thinking of the graphic link would be a mana burn or life drain graphic.. but once the caster moves.. the line gets cutted..
well then i know the problem with the lighning effect.... make another trigger that happens every .01 sec and creates the desired lightning effect the shut off the trigger when the spell ends.