i put spell here cause attachement is on approval
chain lightning lvl 16 state this:
caster creates a bolt of lightning which jumps from target to target until the number of targets attacked equals the caster's lvl/5. caster directed spell bonus apllies only to 1st target. each target must be within 100' of each other to be affected, otherwise the bolt will simply dissipate. A target may be attacked more than one by the same bolt. A bolt may arc to an object such as a column of stone, a statue, a door, a wall, a floor, or even the ground, and proceede from there.Each target make a rr with no modifier. If target is successful, he is not attacked during that jump. If unsuccessful, apply elemental defenses normally.
then the spel give some penalty in base of at for rr result.
there is a note that state : if the bolt fail a rr vs itself while arcing to an inanimate object, it has grounded out and presents no further threat.
i have another question too: if a target success his rr is it considered attacked or only who fail is considered a valid target ??