Soul Storm is a powerful Voodoo attack used by Jolly Roger himself during Invasions. It is very similar to Desolation.
Witnesses say the hex can do anywhere from 500 to over 2,000 damage depending on the number of players, so be careful! This makes the attack fatal for most pirates under about level thirty-eight. It hits all enemies within a certain radius of Jolly Roger, but it has a relatively short range. The best way to avoid it is to get out of range. If you see him raise his arms, RUN! This is usually a sign he is about to use it.