LOL? Chain lightning = Lightning revenant`s ability from Warcraft, Dota map.
I actually like this idea, although adding 1 damage each jump seems sort of Op,
creature #1= high chance survival
#2= good chance of survival
#3 = medium chance of survival
#4 = low chance
#5 = quite low chance
etc.
# last creature: I feel sorry for the last creature
.
perhaps making the damage reach a limit and then doing the same damage each jump?
for example. for the first 4 creatures, each jump adds 1 damage, the rest of the creatures receive the same damage that the fifth creature received. (since it starts jumping from the second creature)
maybe?