It's a replacement from thunder, but at the same time show how useless tri-disaster is. Ever since we can use Blizzard 2 it just shown no purpose other than just for bind....once. At that point the only big thing I kept asking is to buff it to be useful to replace blizzard 2 as a cross class. To AoE at a distance instead of closed in.

For thunder being contagion, I never really thought that it would work at the time, but potent poison pot seems to be the replacement.